Bob and Nikki
by Jerry Boyd
4.53 · 336 ratings
sci-fi · humor · fiction · book · adult · first-contact · action-adventure · space-opera · aliens · ai · violent-conflict · invasion · slavery · comedy · paranormal · cozy · space · young-adult · comics · dystopia
Bob and Nikki: Similar series
Junkyard Pirate
by Jamie McFarlane
4.43 · 101 ratings
space-opera · sci-fi · violent-conflict · space · adult · military · first-contact · book · invasion · aliens · fiction · colonization · soldiers · audiobook · action-adventure · space-travel · humor · exploration · outlaws · galactic-empire
All books in this series ❯
Mission Earth
by L. Ron Hubbard
3.44 · 220 ratings
sci-fi · space-opera · satire · adult · action-adventure · fiction · humor · book · violent-conflict · hard-sci-fi · aliens · political-intrigue · space · invasion · workplace · epic · espionage · military · first-contact · space-fleet
All books in this series ❯
Cosmos' Gateway
by S.E. Smith
4.17 · 138 ratings
audiobook · contemporary · alpha-mc · romance · sci-fi · aliens · fiction · paranormal · invasion · book · first-contact · military · space-fleet · adult · violent-conflict · soldiers · action-adventure · futuristic · steamy · alternate-history
All books in this series ❯
The Legend of ZERO
by Sara King
4.33 · 138 ratings
book · aliens · fiction · action-adventure · space-opera · sci-fi · post-apocalyptic · space · violent-conflict · first-contact · invasion · dystopia · war · futuristic · military · galactic-empire · adult · journey · horror · humor
All books in this series ❯
Axiom
by Tim Pratt
3.86 · 49 ratings
military · first-contact · violent-conflict · adult · sci-fi · space-opera · action-adventure · mystery · aliens · exploration · fiction · hard-sci-fi · lgbtq · space · colonization · invasion · book · space-fleet · space-travel · humor
All books in this series ❯
The Human Division
by John Scalzi
4.07 · 243 ratings
adult · violent-conflict · military · space-opera · space-travel · sci-fi · fiction · aliens · space · soldiers · humor · action-adventure · exploration · war · genetic-engineering · audiobook · galactic-empire · colonization · book · first-contact
All books in this series ❯
Claimings
by Lyn Gala
4.17 · 63 ratings
mlm · steamy · book · romance · audiobook · paranormal · aliens · fiction · lgbtq · age-gap · adult · sci-fi · space · friends-to-lovers · action-adventure · slow-burn · violent-conflict · military · angst · invasion
All books in this series ❯
Lords of the Var
by Michelle M. Pillow
4.09 · 74 ratings
paranormal · dragons · romance · shapeshifters · adult · aliens · fiction · action-adventure · audiobook · space · supernatural · urban-fantasy · royalty · book · steamy · sci-fi · space-opera · futuristic · alpha-mc · literary-fiction
All books in this series ❯
AI Reborn
by Isaac Hooke
4.10 · 36 ratings
space · violent-conflict · adult · cyberpunk · cyborgs · first-contact · military · space-fleet · ai · space-opera · space-travel · soldiers · sci-fi · aliens · exploration · colonization · fiction · apocalyptic · book · invasion
All books in this series ❯
Metal Boxes
by Alan Black
4.17 · 42 ratings
violent-conflict · space · audiobook · military · comedy · space-opera · sci-fi · action-adventure · humor · aliens · fiction · book · war · space-fleet · adult · first-contact · young-adult · expert · dragons · soldiers
All books in this series ❯
Rogue Alien Warriors
by Hattie Jacks
4.21 · 29 ratings
adult · first-contact · paranormal · aliens · fiction · humor · poc-mc · book · space-opera · sci-fi · action-adventure · romance · fated-mates · alpha-mc · grumpy-mc · monsters · multi-pov · space-travel · dark · fantasy
All books in this series ❯
Children of a Dead Earth
by Patrick S. Tomlinson
3.86 · 28 ratings
colonization · invasion · book · audiobook · space · dystopia · action-adventure · mystery · aliens · fiction · crime · violent-conflict · adult · sci-fi · space-opera · dying-earth · police-procedural · conspiracies · political-intrigue · humor
All books in this series ❯
Stryxian Alien Warriors
by Ella Blake
4.29 · 62 ratings
aliens · fiction · sci-fi · adult · romance · book · first-contact · violent-conflict · invasion · paranormal · humor · action-adventure · space-opera · cyborgs · historical · fated-mates · female-mc · military · galactic-empire · space
All books in this series ❯
Elite Rogue Alien Warriors
by Hattie Jacks
4.10 · 30 ratings
fated-mates · poc-mc · fantasy · aliens · fiction · sci-fi · adult · romance · book · dystopia · humor · action-adventure · space-opera · steamy · supernatural · paranormal · psychics · demons · adaptations · first-contact
All books in this series ❯
Space Lords
by Michelle M. Pillow
4.34 · 42 ratings
aliens · action-adventure · fiction · adult · paranormal · humor · sci-fi · space-travel · space-opera · romance · book · urban-fantasy · audiobook · genetic-engineering · dragons · exploration · first-contact · steamy · futuristic · space
All books in this series ❯
The Clockwork Chimera
by Scott Baron
4.26 · 34 ratings
space · adult · violent-conflict · sci-fi · space-opera · aliens · fiction · invasion · book · action-adventure · apocalyptic · audiobook · first-contact · genetic-engineering · ai · humor · military · soldiers · time-travel · romance
All books in this series ❯
Lords of Destra
by Ella Blake
4.38 · 32 ratings
book · aliens · fiction · adult · invasion · action-adventure · sci-fi · violent-conflict · first-contact · kidnapping · steamy · fated-mates · romance · humor · space-opera · enemies-to-lovers · dark · forced-proximity · monsters · futuristic
All books in this series ❯
Space Rogues
by John Wilker
4.28 · 25 ratings
action-adventure · fiction · outlaws · book · space · adult · space-travel · space-opera · sci-fi · humor · first-contact · galactic-empire · aliens · exploration · male-mc · box-set
All books in this series ❯
Gateway to the Galaxy
by Jonathan Yanez
4.23 · 36 ratings
fiction · sci-fi · military · adult · violent-conflict · humor · super-powered · soldiers · space-opera · space · aliens · first-contact · invasion · book · supernatural · colonization · galactic-empire · action-adventure · space-fleet · genetic-engineering
All books in this series ❯
Venora Mates
by Octavia Kore
3.95 · 21 ratings
fiction · adult · book · humor · action-adventure · aliens · monsters · lgbtq · violent-conflict · polyamory · horror · dark · sci-fi · colonization · supernatural · reverse-harem · invasion · romance · genetic-engineering · paranormal
All books in this series ❯
Fated Mates of the Titan Empire
by Tammy Walsh
4.15 · 27 ratings
aliens · fiction · humor · sci-fi · colonization · book · invasion · romance · adult · genetic-engineering · violent-conflict · first-contact · galactic-empire · space-travel · space-opera · paranormal · action-adventure · military · new-adult · prison
All books in this series ❯
Avroxee Mates
by Amelia Wilson
3.75 · 12 ratings
first-contact · adult · violent-conflict · space-opera · action-adventure · aliens · fiction · invasion · romance · book · audiobook · sci-fi · paranormal · humor · shapeshifters · genetic-engineering · box-set · space-travel · demons · insta-love
All books in this series ❯
Alien Fated Mates for Ajnara Warriors
by Pearl Tate
4.40 · 20 ratings
paranormal · romance · adult · aliens · fiction · humor · post-apocalyptic · military · sci-fi · fated-mates · zombies · book · violent-conflict · first-contact · action-adventure · kind-mc · invasion · space-opera · soldiers · poc-mc
All books in this series ❯
Conroyverse
by Lawrence M. Schoen
4.00 · 7 ratings
sci-fi · adult · fiction · action-adventure · book · humor · satire · space-opera · space-travel · space · violent-conflict · first-contact · invasion · aliens · genetic-engineering · animals · heist · exploration · anthologies
All books in this series ❯