Books like 'Without Warning: Cobalt Security, Book 1'

Readers who enjoyed Without Warning: Cobalt Security, Book 1 by Reese Knightley also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.

contemporary  romance  action / adventure  mystery  suspense  mlm  crime  lgbtq  law-enforcement  billionaire 

  • Rescuing Erin by Riley Edwards

    Rescuing Erin by Riley Edwards

    Rated: 4.57 of 5 stars
    · 14 ratings
    Ex-Green Beret Colin Doyle has the most maddening, frustrating job in Washington D.C.—protecting the First Daughter of the United States. Erin Anderson is irresistibly beautiful, quick-witted and cunning, completely untouchable—and apparently bound and determined to lure him out of his dark shades and neutral suit...
  • Engaging the Billionaire by Ivy Layne

    Engaging the Billionaire by Ivy Layne

    Rated: 4.50 of 5 stars
    · 14 ratings
    If we can’t outrun the past, we won’t have a future. The rock on her hand is real, but our engagement is a fake. Once upon a time, I dreamed of buying her a ring, until everything blew up in my face. That was the past, and this is business. At least, it is until I kiss her. It's supposed to be part of the act — and it is — right until my lips touch hers. I forget where we are...
  • The Hatter's Game, Part II by Cole McCade

    The Hatter's Game, Part II by Cole McCade

    Rated: 4.60 of 5 stars
    · 10 ratings
    ABOUT THIS EPISODE Malcolm Khalaji is missing. And Seong-Jae Yoon is the only one who can find him. But to do so means walking paths he swore he would never tread again. Descending into the blackest hallways of a twisted and sadistic mind. Breaking down every wall he's ever built around himself, to try to predict what Sila will do next...
    Categorized as:
    age-gap  crime  dark  law-enforcement  lgbtq  mlm  slow-burn  suspense
  • Ryder by Amanda McKinney

    Ryder by Amanda McKinney

    Rated: 4.60 of 5 stars
    · 10 ratings
    He’s an ex-con who just wants to be left alone. She's stranded in the middle of a blizzard—a broken soul… an invitation to danger.Photographer by day, Ben and Jerry’s enthusiast by night, Louise Sloane isn’t known for her organizational skills or obsession to detail...
  • Line of Resistance by Jemma Westbrook, Janice Whiteaker

    Line of Resistance by Jemma Westbrook, Janice Whiteaker

    Rated: 4.60 of 5 stars
    · 10 ratings
    Getting stranded in the snow without cell service wasn’t the worst thing that could have happened to Eloise Rivers.Being saved by the man who’d led her on more than once was...
  • Colder Than Sin by Toni Anderson

    Colder Than Sin by Toni Anderson

    Rated: 4.50 of 5 stars
    · 12 ratings
    Hostage Negotiators can talk themselves out of anything—except falling in love. Top FBI negotiator Quentin Savage is hurled into his worst nightmare when a terrorist attack on a luxury hotel propels him from esteemed keynote speaker to powerless captive...
  • SWAT Ed.: Fox & Bull by A.E. Via

    SWAT Ed.: Fox & Bull by A.E. Via

    Rated: 4.43 of 5 stars
    · 14 ratings
    A fox can set many traps to catch his target—but this one only needs one to catch his.Dominic “Bull” Walker is used to the simpler things in life. Give him his own land to work, a strong horse, and twelve hours of daylight, and he is a contented man. But when someone threatens to take away the successful ranch that took him two years to rebuild, he’ll accept any help he can get to defend it...
  • Tyler by Nyssa Kathryn

    Tyler by Nyssa Kathryn

    Rated: 4.43 of 5 stars
    · 14 ratings
    Sometimes, the biggest secrets can bring both salvation and destruction.Emerson Charles grew up luckier than most, going from a difficult life to finding safety and a true home with her stepmother and stepbrother. Years later, when Levi's in trouble, Emerson will do anything for the brother of her heart, her greatest protector...
  • Devour by Jocelynn Drake, Rinda Elliott

    Devour by Jocelynn Drake, Rinda Elliott

    Rated: 4.38 of 5 stars
    · 16 ratings
    Ian Pierce is the chef and part owner of the hottest restaurant in Cincinnati, his chosen family is full of happy relationships, and the scruffy, snarky cop who has been haunting his dreams is one step closer to being in his bed. But everything comes crashing down when the past he narrowly escaped nine years ago comes to a deadly head. Hollis Banner was enamored of Ian at first sight...
    Categorized as:
    age-gap  bodyguard  crime  dark  law-enforcement  lgbtq  military  mlm
  • Ranger by Rebecca Sharp

    Ranger by Rebecca Sharp

    Rated: 4.38 of 5 stars
    · 16 ratings
    Sydney Ward woke up on the wrong side of life—that’s what it feels like when cancel culture claims another victim...
  • Diamond in the Rough by Charlie Cochet

    Diamond in the Rough by Charlie Cochet

    Rated: 4.35 of 5 stars
    · 17 ratings
    When the cards are stacked against you, the Kings will even the odds. For Ward “King” Kingston the role of protector, forged by fire and tragedy, is one he takes seriously. When King is asked to safeguard the son of a four-star general and friend, he is pulled back into the world of government black ops on a mission that raises painful memories from his past...
  • Hide & Seek by Nicole Edwards

    Hide & Seek by Nicole Edwards

    Rated: 4.50 of 5 stars
    · 10 ratings
    With the holidays nearing, Brantley Walker and Reese Tavoularis are getting settled, both personally and professionally. For Reese, dealing with Brantley’s about-face regarding the size of the task force is easy. It’s meeting the parents that he’s worried about...
    Categorized as:
    age-gap  crime  lgbtq  military  mlm  suspense  action-adventure  adult
  • Lead Security by Evan Grace

    Lead Security by Evan Grace

    Rated: 4.50 of 5 stars
    · 10 ratings
    I’ve spent the last several years building my company, having zero time for a social life. I preferred it that way. After the mess my ex-wife left me with, I have no interest in anything remotely close to a relationship. Until I meet my daughter’s new next-door neighbor. Harley is kind, beautiful, and she’s also an erotic romance writer. To any man, she’s the perfect package...
  • Murder Aforethought by Parker St. John

    Murder Aforethought by Parker St. John

    Rated: 4.50 of 5 stars
    · 10 ratings
    A ticking clock. A deadly enemy. Can they keep their heads in the game when their hearts are already on the line? Valentine Rivetti made a horrible mistake when he became a Marine Sniper at the age of twenty. Returning home with PTSD and a guilty conscience, he’s blackmailed into working for the mafia to save his family...
  • Marked for Deception by Anna Blakely

    Marked for Deception by Anna Blakely

    Rated: 4.50 of 5 stars
    · 10 ratings
    He lied to catch a killer. She just wanted to escape the past. Neither realized just how deadly their deceptions could be.Denver homicide detective Declan King lives by a strict code. But when he’s tasked with using an escaped serial killer’s daughter to catch the twisted murderer, his black and white world becomes blurred in ways he never could’ve imagined...
  • Mad Man by Onley James

    Mad Man by Onley James

    Rated: 4.32 of 5 stars
    · 19 ratings
    Avi Mulvaney is many things. Son. Twin. Owner of the fashion label, Gemini. Murderous psychopath. Together, he and his brother, Asa, make one brutally efficient monster, ridding the world of predators who victimize the innocent. History proves Avi and Asa don’t do well apart, but their father has decided to test that theory.Felix Navarro knows exactly who he is. Baby brother. Fashionista...
  • A Chosen Man by Jaime Reese

    A Chosen Man by Jaime Reese

    Rated: 4.42 of 5 stars
    · 12 ratings
    For Wall McCormack, actions speak louder than words. He’s giving and protective, loyal to his friends, and devoted to his job. While confident and powerful enough to conquer any challenge, his greatest strength lies in his calm nature. Until an unexpected assignment sends his world into a loud and colorful chaos he never could have anticipated. Rejection...
  • Tied Over by Mary Calmes

    Tied Over by Mary Calmes

    Rated: 4.42 of 5 stars
    · 12 ratings
    Josiah Redeker has been tied up, tied down, and just plain tied to Bodhi Callahan since the younger marshal was paired with him five years ago. It was an easy slide from partners to best friends, and though Bodhi wanted more, Josiah thought Bodhi could do far better than him...
  • Bad at Love by Aimee Nicole Walker

    Bad at Love by Aimee Nicole Walker

    Rated: 4.35 of 5 stars
    · 13 ratings
    Bad at making decisions or bad at love? Either way, Kendall Blakemore doesn’t trust his judgment. He falls too hard, too fast, and always for the wrong guy. Needing a major shakeup, Kendall moves into his own place for the first time and seizes a new career opportunity. But everything he thought he wanted turns out to be the last thing he needs...
  • Back in Black by Julie Ann Walker

    Back in Black by Julie Ann Walker

    Rated: 4.50 of 5 stars
    · 8 ratings
    A secret identity mixed in with forced proximity on top of red-hot chemistry? What could go wrong? The Black Knights are back and better than ever! FBI agent Grace Beacham is on the run. After an operation to bring down a Russian disinformation campaign goes sideways and ends in her partner’s death, the Kremlin has sent its most notorious assassin to kill her...
  • Bulletproof by Reese Knightley

    Bulletproof by Reese Knightley

    Rated: 4.40 of 5 stars
    · 10 ratings
    It all started with a glimpse.- A chance encounter left an impression and Wolfgang Brandt was hooked. When Caleb turns eighteen in two months, Wolf is going to be at that birthday party come hell or high water. He doesn’t care if he has to fly across the world to be there. But then things go south and Wolf is left reeling when Caleb goes missing...
    Categorized as:
    age-gap  crime  dark  lgbtq  military  mlm  suspense  abuse
  • Rampage by Reese Knightley

    Rampage by Reese Knightley

    Rated: 4.40 of 5 stars
    · 10 ratings
    Explosive action, bullets flying, heroes, villains, and love, you don’t want to miss this next installment in Reese Knightley’s Out for Justice series. Read Ricochet and Collide before diving into the next story! -Rampage - Three strong, independent, and protective badasses are on the cusp of romance when tragedy and disaster come at them like a landslide...
  • Falling for the Ice Queen by Cynthia Eden

    Falling for the Ice Queen by Cynthia Eden

    Rated: 4.40 of 5 stars
    · 10 ratings
    He’s more than a little rough around the edges…Memphis Camden isn’t a nice guy. He’s big, dangerous, and has an extremely low tolerance for BS. A former bounty hunter, Memphis now has a deadly new target…a serial killer. Memphis has been tracking the guy for months, and he may just have found the way to drag the monster into the light...
  • The Hatter's Game, Part I by Cole McCade

    The Hatter's Game, Part I by Cole McCade

    Rated: 4.40 of 5 stars
    · 10 ratings
    ABOUT THIS EPISODE Broken trust. Shattered hearts. Secrets exposed--and yet still no closer to the truth. When Malcolm and Seong-Jae's relationship hits a wall, their partnership fragments as well...and they may not be able to withstand the crushing tide when protests over Tomasz Kowalczyk's death turn into deadly riots. Too many familiar faces return, and one will be leaving in a bodybag...
    Categorized as:
    age-gap  crime  dark  law-enforcement  lgbtq  mlm  slow-burn  suspense
  • The Golden Ratio by Cole McCade

    The Golden Ratio by Cole McCade

    Rated: 4.40 of 5 stars
    · 10 ratings
    ABOUT THIS EPISODE The boys are back, and an old face from Seong-Jae’s past plunges BPD Detectives Malcolm Khalaji and Seong-Jae Yoon from a two-month suspension right into the depths of hell — and into one of the most horrific, grisly cases of Malcolm’s life. He's never seen anything like it...
    Categorized as:
    age-gap  crime  dark  law-enforcement  lgbtq  mlm  slow-burn  suspense
  • Lethal Temptation by Kaylea Cross

    Lethal Temptation by Kaylea Cross

    Rated: 4.40 of 5 stars
    · 10 ratings
    She’s got her guard up.Detective Avery Dahl finally has her life back on track after a painful divorce. She’s not going to risk her heart again, especially to a sexy veteran with heartbreak written all over him. Due to extenuating circumstances at an upcoming family wedding, she reluctantly agrees to bring him as her fake boyfriend—and soon realizes her mistake...
  • Played by Cara Dee

    Played by Cara Dee

    Rated: 4.40 of 5 stars
    · 10 ratings
    The Auctioned Series is a journey packed with action, nail-biting suspense, family, and love. In Gray and Darius’s fight for freedom and a future where they aren’t haunted by the ghosts of their pasts, they’ll make you laugh, cry, possibly yell at your e-reader, and swoon just a little bit. One last mission. One last operation—and the stakes had never been higher...
  • Finished by Cara Dee

    Finished by Cara Dee

    Rated: 4.40 of 5 stars
    · 10 ratings
    Book 5 | Romantic Suspense | Hurt/Comfort | Trauma | Age Difference The Auctioned Series is a journey packed with action, nail-biting suspense, family, and love. In Gray and Darius’s fight for freedom and a future where they aren’t haunted by the ghosts of their pasts, they’ll make you laugh, cry, possibly yell at your e-reader, and swoon just a little bit...
  • Mine to Guard by Kennedy L. Mitchell

    Mine to Guard by Kennedy L. Mitchell

    Rated: 4.40 of 5 stars
    · 10 ratings
    Being ripped from her mundane life by a swarm of police officers is not what Rae Chapin expected when she woke up this morning. Accused of a series of murders she didn’t commit, Rae doesn’t have anyone to rely on. Except him...
  • On the Double by Cara Dee

    On the Double by Cara Dee

    Rated: 4.40 of 5 stars
    · 10 ratings
    The Renegades #3 • Romantic Suspense • Action • MMM“It’s a fine line between not revealing your arsenal and creating disorder by showing your strength.”Funny how calm you could feel when someone had ripped the heart out of your chest.River and Reese Tenley had grown up on the fringes of society, spending most of their adult years as private military contractors in places nobody else wanted to go...
    Categorized as:
    mlm  military  lgbtq  suspense  age-gap  found-family  dark  crime
  • Dealing Him In by Charlie Cochet

    Dealing Him In by Charlie Cochet

    Rated: 4.33 of 5 stars
    · 12 ratings
    Play with fire, and you’ll get burned.Santos “Saint” Cavallero had his life all figured out when he married his high school sweetheart, joined the Navy, and became a SEAL. After years of being deployed, Saint comes home for good, only to discover his wife has fallen for another man. Now divorced and a bodyguard for Four Kings Security, Saint loves his job and his found family...
  • Reign by Cassandra Robbins

    Reign by Cassandra Robbins

    Rated: 4.33 of 5 stars
    · 12 ratings
    WHAT HAPPENS WHEN TWO LEGENDS COLLIDE?From USA Today bestselling author Cassandra Robbins comes her latest sinfully hot rockstar romance. A scorching, enemies to lovers, deliciously addictive stand-alone about rock ‘n’ roll royalty and burning obsessions.They call him a legend.One of the greatest guitarists of our time.The mighty Ace of Spades brought in to produce my album and save the day...
  • Captivating by Onley James

    Captivating by Onley James

    Rated: 4.29 of 5 stars
    · 14 ratings
    Jayne Shepherd has spent his life blending in. He smiles. He laughs. He’s likable. He’s also a sociopath. His emotions are limited. Love, fear, desire don’t exist in his world. Until he meets Elijah. Elijah Dunne had everything. Third generation Hollywood royalty. Child star. Untouchable. Until one man ruined it all...
  • Nori's Delta by Lori Ryan

    Nori's Delta by Lori Ryan

    Rated: 4.29 of 5 stars
    · 14 ratings
    He won’t lose her again…Delta Operative Heath “Woof” Davis has spent years living on the edge. Protecting a State Department official is just another assignment until he discovers that Eleanor Bonham is Nori Duncan, the one that got away...
  • Fearless by April Wilson

    Fearless by April Wilson

    Rated: 4.25 of 5 stars
    · 16 ratings
    Beth Jamison: Since childhood, I’ve lived under a shadow of fear and anxiety, afraid to trust anyone. All that changed when I met Shane. He taught me to cope with my fears. He gave me the courage to let someone in. But the threat’s still out there, and it’s coming back for me. I know Shane won’t let him get me this time, but at what cost? I can’t lose Shane. I just can’t...
  • Deadly Attraction by Misty Evans

    Deadly Attraction by Misty Evans

    Rated: 4.50 of 5 stars
    · 6 ratings
    A wildfire out of control…His twin brother is dead and the only way National Intelligence officer, Mitch Holden, is going to make it through the holidays is by staying focused on his latest SCVC Taskforce investigation—catching a homegrown terrorist with a penchant for arson. The terrorist has started a wildfire eating up thousands of acres of forest and putting dozens of people in danger...
  • Interlude by C.S. Poe

    Interlude by C.S. Poe

    Rated: 4.50 of 5 stars
    · 6 ratings
    Interlude is a collection of short stories spanning the complete timeline of the Snow & Winter series, beginning with The Mystery of Nevermore, to after the conclusion of The Mystery of the Bones. They feature the point of view of Sebastian Snow and Calvin Winter and consist of mini-mysteries as well as scenes from daily life...
  • Deadly Secrets by Misty Evans

    Deadly Secrets by Misty Evans

    Rated: 4.50 of 5 stars
    · 6 ratings
    ***Blacklist meets Criminal Minds Secrets can get you killed in this latest riveting release in the SCVC Taskforce romantic suspense series by USA TODAY Bestselling Author, Misty Evans. He killed my best friend when we were only girls…but I got away. Now he’s hunting me again. Well-renowned anthropologist and religious studies expert, Dr...
  • The One for Forever by Hannah Shield

    The One for Forever by Hannah Shield

    Rated: 4.50 of 5 stars
    · 6 ratings
    He's the older man I've always wanted. An ex-Special Forces hero. My best friend’s dad.And now, he's the bodyguard assigned to protect me while I prosecute a killer.I’ve wanted Rex Easton since I was eighteen, yet he’s never looked at me twice. I’m determined to finally get over this crush. But after he swears to protect me from the faceless thugs who are after me, I can’t avoid him...
  • Real Risk by Elle Keaton

    Real Risk by Elle Keaton

    Rated: 4.38 of 5 stars
    · 8 ratings
    It's possible they're a match but first the two men will have to survive trial by fire. Chief Flynn is fighting smoke and flames, tirelessly protecting the lives and property of his fellow islanders from yet another spate of fires.Arson or accident?When injury puts him on the sidelines, West Coast Forensics Arson Investigator Kimball Frye offers his assistance...
  • Rebel by Reese Knightley

    Rebel by Reese Knightley

    Rated: 4.38 of 5 stars
    · 8 ratings
    One man on a journey of redemption and the other out to prove himself.Cohen “Ace” Gray – Pegasus Commander.He’d buried one lover; he wasn’t going to take the chance of that ever happening again. Ace had his own demons to work on, but working closely with Jacob and having his friendship— despite their twenty-year age difference—had made life a bit easier...
  • Enticed by the Enemy by Leighton Greene

    Enticed by the Enemy by Leighton Greene

    Rated: 4.38 of 5 stars
    · 8 ratings
    He’s an FBI profiler who’s half my age. Contact between us is forbidden. But I can’t stay away from him.As the Morelli Underboss, I'm the Family problem-solver. So when a task force blames the Morellis for a series of murders in Central Park, it's up to me to restore our reputation...
  • Seduced by a Sinner by Leighton Greene

    Seduced by a Sinner by Leighton Greene

    Rated: 4.38 of 5 stars
    · 8 ratings
    He’s innocent. He’s chaste. He’s promised to God. And he’s more temptation than I can handle.I’m supposed to guard the Boss's husband, but I just can’t keep my eyes off his best friend, Aidan O’Leary.Watching him.Wanting him.Knowing I can never have him.Aidan is pure in body and soul. He’s about to be ordained as a priest. Me? I’m going to burn for the things I’ve done...
  • 默读 by Priest

    默读 by Priest

    Rated: 4.38 of 5 stars
    · 8 ratings
    ...
    Categorized as:
    lgbtq  mlm  suspense  dark  crime  law-enforcement  romance  mystery
  • Enemy Combatant by Cara Dee

    Enemy Combatant by Cara Dee

    Rated: 4.38 of 5 stars
    · 8 ratings
    The Renegades #2 • Romantic Suspense • Stockholm Syndrome • Hurt Comfort • Action • MM“The best intelligence is the knowledge that your enemy doesn’t know you have.”Crew Finlay’s ego had taken a hit or two. He couldn’t lie. As a Marine, he’d been one of the best. As a private military contractor, he’d…messed up a bit. Or failed spectacularly. Whatever...
    Categorized as:
    mlm  military  suspense  lgbtq  dark  age-gap  forced-proximity  crime
  • A Heart's Desire by Kris Michaels

    A Heart's Desire by Kris Michaels

    Rated: 4.30 of 5 stars
    · 10 ratings
    Agent McKenzie is nobody's 'yes' boy and has the letters of reprimand to prove it. He smells the stink of political maneuvering in this case, and he can see the handwriting on the wall. Hell, the words are three feet high and written in crayon. Someone in his agency wants a target on Liam Mercier's back, but McKenzie would be damned if he'd put one there...
    Categorized as:
    crime  dark  law-enforcement  lgbtq  military  mlm  suspense  abuse
  • Beauty and the Assassin by Nadia Lee

    Beauty and the Assassin by Nadia Lee

    Rated: 4.30 of 5 stars
    · 10 ratings
    AngelikaA sociopath has stalked me mercilessly for eight years. It’s only a matter of time before he kills me. But then I meet Tolyan.He bursts into my life like a god of vengeance, seething with raw power and danger, trained to protect—or kill. He has a scowl for the world, but for some reason, he’s gentle with me and the idea of deadly power leashed only for me makes my heart flutter...
  • Tied Up in Steele by Annabella Stone

    Tied Up in Steele by Annabella Stone

    Rated: 4.30 of 5 stars
    · 10 ratings
    Steele Givens doesn’t do relationships and he knows better than to fall for a man he rescued during a CIA Operation; but then he’s never been a ‘follow the rules’ kinda man. He always swore he’d never drag someone he cared about into a world of danger. But what do you do, when danger stalks him anyway? Kalon Roberts wanted to move on. He’s done with danger and Black Ops Operators...
  • Saving Mitch by Emily Matthews

    Saving Mitch by Emily Matthews

    Rated: 4.30 of 5 stars
    · 10 ratings
    Do opposites always attract? Will sweet, clumsy Maggie and troubled, bad-boy Mitch find love amidst the danger that surrounds them? Find out in this romantic, suspenseful, sometimes funny debut novel by Emily Matthews. Tormented police officer Mitch MacDonald will stop at nothing to find a killer, and his obsession is about to cost him his job...
  • Protecting the Soul by Annabella Michaels

    Protecting the Soul by Annabella Michaels

    Rated: 4.25 of 5 stars
    · 12 ratings
    For Landon Greene, managing the band Carter’s Creed is more than just a job. It also means being there to keep his brother safe. When someone begins sending threatening letters to Carter, Landon feels overwhelmed with the need to protect him...
    Categorized as:
    bodyguard  crime  dark  law-enforcement  lgbtq  military  mlm  stalking
Fantastic book recommendations by book lovers for book lovers.
Find out more about thebooknaut.com.



Looking for more inspiration? Enter another book title to get more suggestions on what to read next.


Or - use our amazing romance book finder to get recommendations based on your favorite content tropes and themes. Mix and match at will.