Cryptid Assassin: Similar romance series

The Origin Mystery

by A.G. Riddle

3.85 · 91 ratings

sci-fi · historical-fiction · futuristic · apocalyptic · drama · action-adventure · mystery · aliens · suspense · conspiracies · paranormal · fiction · political-intrigue · audiobook · myths · dystopia · post-apocalyptic · book · technothriller · time-travel

All books in this series ❯

Legacy Fleet Trilogy

by Nick Webb

4.10 · 89 ratings

action-adventure · supernatural · soldiers · sci-fi · galactic-empire · space-opera · first-contact · space-travel · military · audiobook · adult · space-fleet · space · violent-conflict · invasion · war · book · technothriller · colonization · exploration

All books in this series ❯

The First Formic War

by Orson Scott Card

4.03 · 79 ratings

military · war · book · family · futuristic · invasion · fiction · aliens · action-adventure · young-adult · space-travel · space-opera · sci-fi · space-fleet · dystopia · space · violent-conflict · first-contact · audiobook · apocalyptic

All books in this series ❯

Rho Agenda Chronological

by Richard Phillips

4.10 · 219 ratings

sci-fi · violent-conflict · action-adventure · fiction · audiobook · book · technothriller · aliens · suspense · first-contact · mystery · military · adult · invasion · space-opera · political-intrigue · espionage · politics · space · space-travel

All books in this series ❯

Breakthrough

by Michael C. Grumley

4.29 · 189 ratings

action-adventure · mystery · fiction · military · adult · sci-fi · book · technothriller · audiobook · suspense · violent-conflict · politics · first-contact · conspiracies · political-intrigue · aliens · animals · contemporary · drama · nautical

All books in this series ❯

Confluence

by Jennifer Foehner Wells

4.09 · 118 ratings

aliens · exploration · fiction · female-mc · space-opera · space-travel · sci-fi · adult · book · space · action-adventure · violent-conflict · first-contact · invasion · audiobook · futuristic · military · female-author · technothriller · romance

All books in this series ❯

The Gender Game

by Bella Forrest

4.01 · 165 ratings

book · post-apocalyptic · romance · young-adult · dystopia · audiobook · war · futuristic · fiction · action-adventure · new-adult · sci-fi · violent-conflict · military · survival · family · mystery · technothriller · paranormal · genetic-engineering

All books in this series ❯

The Rho Agenda: Inception

by Richard Phillips

4.14 · 64 ratings

action-adventure · mystery · sci-fi · assassins · political-intrigue · first-contact · military · audiobook · adult · violent-conflict · assassinations · espionage · crime · book · technothriller · fiction · conspiracies · suspense · politics · 21st-century

All books in this series ❯

Tao

by Wesley Chu

3.84 · 81 ratings

audiobook · espionage · fiction · aliens · action-adventure · sci-fi · book · political-intrigue · crime · spirituality · humor · alternate-history · space-fleet · male-author · first-contact · military · violent-conflict · invasion · religion · urban-fantasy

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 ❯

Area 51

by Bob Mayer

3.95 · 192 ratings

paranormal · book · sci-fi · violent-conflict · adult · first-contact · war · action-adventure · aliens · fiction · military · audiobook · soldiers · political-intrigue · conspiracies · technothriller · supernatural · mystery · alternate-history · 21st-century

All books in this series ❯

The Forgotten

by M.R. Forbes

4.15 · 48 ratings

sci-fi · space · genetic-engineering · adult · dystopia · military · audiobook · space-fleet · apocalyptic · book · violent-conflict · invasion · post-apocalyptic · action-adventure · aliens · fiction · space-opera · political-intrigue · conspiracies · war

All books in this series ❯

Web Shifters

by Julie E. Czerneda

4.07 · 41 ratings

action-adventure · aliens · exploration · fiction · book · shapeshifters · audiobook · female-author · space · adult · sci-fi · paranormal · space-opera · political-intrigue · hard-sci-fi · invasion · violent-conflict · survival · conspiracies · suspense

All books in this series ❯

Planetside

by Michael Mammay

3.98 · 41 ratings

violent-conflict · adult · military · first-contact · space-opera · sci-fi · mystery · aliens · exploration · fiction · war · space · audiobook · political-intrigue · conspiracies · book · law-enforcement · space-travel · soldiers · action-adventure

All books in this series ❯

Aurora Rising

by G.S. Jennsen

4.13 · 66 ratings

sci-fi · space-travel · space-opera · first-contact · military · fiction · action-adventure · galactic-empire · cyberpunk · colonization · space-fleet · violent-conflict · aliens · exploration · ai · space · romance · book · soldiers · adult

All books in this series ❯

The Comet Cycle

by Benjamin Percy

3.72 · 72 ratings

post-apocalyptic · violent-conflict · invasion · literary-fiction · book · supernatural · aliens · fiction · action-adventure · mystery · conspiracies · paranormal · political-intrigue · super-powered · suspense · first-contact · sci-fi · adult · dystopia · magical-realism

All books in this series ❯

Mail-Order Brides of Crakair

by Ava Ross

4.19 · 82 ratings

action-adventure · humor · romance · book · sci-fi · adult · fiction · aliens · galactic-empire · audiobook · invasion · colonization · violent-conflict · dystopia · steamy · insta-love · first-contact · paranormal · new-adult · soldiers

All books in this series ❯

Children of a Dead Earth

by Patrick S. Tomlinson

3.86 · 28 ratings

invasion · adult · violent-conflict · space-opera · sci-fi · aliens · fiction · action-adventure · mystery · crime · dystopia · space · audiobook · colonization · book · space-fleet · first-contact · law-enforcement · military · space-travel

All books in this series ❯

The Lamb Among the Stars

by Chris Walley

4.21 · 38 ratings

invasion · violent-conflict · christian · aliens · fiction · spirituality · action-adventure · humor · sci-fi · book · horror · dark · mystery · adult · military · religion · space-fleet · children · space-opera · futuristic

All books in this series ❯

The Rift Uprising Trilogy

by Amy S. Foster

3.65 · 20 ratings

military · audiobook · book · invasion · aliens · action-adventure · super-powered · fiction · young-adult · soldiers · sci-fi · dystopia · violent-conflict · first-contact · contemporary · futuristic · romance · apocalyptic · urban-fantasy · new-adult

All books in this series ❯

The Sibyl's War

by Timothy Zahn

3.68 · 19 ratings

action-adventure · fiction · invasion · aliens · book · first-contact · violent-conflict · space · survival · sci-fi · space-opera · young-adult · hard-sci-fi · military · space-fleet · conspiracies · political-intrigue · mystery · exploration · steampunk

All books in this series ❯