Chronicles of the Second Interstellar Empire of Mankind: Similar romance series

Lost Colonies Trilogy

by B.V. Larson

4.05 · 53 ratings

book · first-contact · violent-conflict · hard-sci-fi · invasion · war · action-adventure · aliens · exploration · fiction · colonization · space-travel · space-opera · galactic-empire · sci-fi · genetic-engineering · space · space-fleet · adult · audiobook

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 ❯

Doom Star

by Vaughn Heppner

3.92 · 104 ratings

dystopia · genetic-engineering · space · galactic-empire · colonization · post-apocalyptic · invasion · book · military · space-fleet · adult · violent-conflict · soldiers · sci-fi · space-opera · fiction · action-adventure · aliens · space-travel · exploration

All books in this series ❯

Ascension Wars

by Jasper T. Scott

3.86 · 58 ratings

industrial-era · genetic-engineering · space · galactic-empire · colonization · supernatural · invasion · post-apocalyptic · book · military · first-contact · violent-conflict · historical · adult · space-fleet · soldiers · sci-fi · space-travel · exploration · fiction

All books in this series ❯

Aeon 14: The Intrepid Saga

by M.D. Cooper

4.18 · 67 ratings

cyberpunk · space · colonization · space-opera · soldiers · sci-fi · adult · violent-conflict · military · hard-sci-fi · fiction · galactic-empire · space-travel · space-fleet · exploration · action-adventure · female-mc · alpha-mc · audiobook · book

All books in this series ❯

Koban

by Stephen W. Bennett

4.26 · 93 ratings

aliens · fiction · colonization · book · war · invasion · genetic-engineering · space · space-fleet · audiobook · military · violent-conflict · first-contact · space-opera · galactic-empire · sci-fi · action-adventure · adult · survival · ai

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 ❯

Lost Starship

by Vaughn Heppner

4.24 · 155 ratings

military · space-fleet · adult · genetic-engineering · violent-conflict · soldiers · galactic-empire · space-opera · colonization · aliens · fiction · action-adventure · invasion · book · space · sci-fi · audiobook · space-travel · exploration · ai

All books in this series ❯

Backyard Starship

by J.N. Chaney

4.57 · 202 ratings

fiction · book · military · violent-conflict · sci-fi · space · space-fleet · soldiers · space-opera · action-adventure · aliens · adult · galactic-empire · colonization · invasion · genetic-engineering · audiobook · pulp · young-adult · ai

All books in this series ❯

The Last War

by Peter Bostrom

4.09 · 34 ratings

aliens · exploration · colonization · fiction · book · technothriller · invasion · genetic-engineering · space · space-fleet · adult · military · violent-conflict · first-contact · space-travel · space-opera · galactic-empire · soldiers · sci-fi · action-adventure

All books in this series ❯

The Last Reaper

by J.N. Chaney

4.43 · 122 ratings

galactic-empire · colonization · invasion · book · military · adult · violent-conflict · soldiers · aliens · fiction · audiobook · cyberpunk · space · sci-fi · genetic-engineering · space-opera · action-adventure · war · first-contact · futuristic

All books in this series ❯

The Last Hunter

by J.N. Chaney

4.44 · 127 ratings

book · invasion · aliens · fiction · colonization · galactic-empire · space-opera · soldiers · sci-fi · adult · space-fleet · space · genetic-engineering · violent-conflict · military · first-contact · action-adventure · audiobook · exploration · space-travel

All books in this series ❯

The Siege of Terra

by Dan Abnett

4.18 · 116 ratings

space · audiobook · violent-conflict · adult · military · sci-fi · action-adventure · exploration · fiction · genetic-engineering · book · space-fleet · space-opera · soldiers · grim-dark · galactic-empire · colonization · invasion · first-contact · aliens

All books in this series ❯

The Henry Gallant Saga

by H. Peter Alesso

4.05 · 58 ratings

galactic-empire · action-adventure · aliens · fiction · invasion · book · time-travel · military · genetic-engineering · violent-conflict · space-fleet · sci-fi · space-opera · colonization · first-contact · war · space · adult · young-adult · paranormal

All books in this series ❯

Carson Mach Adventures

by A.C. Hadfield

3.79 · 24 ratings

aliens · fiction · soldiers · sci-fi · space-opera · galactic-empire · audiobook · military · first-contact · genetic-engineering · space · space-fleet · adult · invasion · violent-conflict · futuristic · book · colonization · action-adventure · ai

All books in this series ❯

Rise of the Empire

by Ivan Kal

4.37 · 91 ratings

sci-fi · aliens · fiction · book · space-fleet · adult · space · violent-conflict · litrpg · military · space-opera · colonization · genetic-engineering · space-travel · war · invasion · galactic-empire · royalty · action-adventure · first-contact

All books in this series ❯

Dawn of Fire

by Guy Haley

3.97 · 37 ratings

space · exploration · fiction · soldiers · sci-fi · military · space-fleet · adult · violent-conflict · book · genetic-engineering · grim-dark · aliens · action-adventure · first-contact · invasion · colonization · galactic-empire · space-opera · audiobook

All books in this series ❯

The Pax Humana Saga

by Endi Webb

3.97 · 34 ratings

fiction · sci-fi · aliens · military · violent-conflict · space-fleet · adult · soldiers · space-opera · colonization · book · space · galactic-empire · genetic-engineering · action-adventure · exploration · first-contact · space-travel · supernatural · invasion

All books in this series ❯

Amaranthe

by G.S. Jennsen

4.32 · 122 ratings

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

All books in this series ❯

Asterion Noir

by G.S. Jennsen

4.39 · 18 ratings

cyberpunk · genetic-engineering · space · audiobook · galactic-empire · politics · suspense · colonization · book · technothriller · invasion · romance · space-fleet · adult · violent-conflict · first-contact · horror · military · space-travel · space-opera

All books in this series ❯

AMP

by Stephen Arseneault

4.04 · 48 ratings

space-travel · galactic-empire · sci-fi · genetic-engineering · space · space-fleet · adult · violent-conflict · military · book · post-apocalyptic · exploration · fiction · colonization · soldiers · first-contact · invasion · futuristic · aliens · space-opera

All books in this series ❯

The Eurynome Code

by K. Gorman

4.27 · 22 ratings

adult · book · space · fiction · sci-fi · space-opera · military · female-author · violent-conflict · first-contact · space-fleet · colonization · galactic-empire · audiobook · genetic-engineering · female-mc · action-adventure · aliens · soldiers · space-travel

All books in this series ❯

Tales of Cinnamon City

by Peter James West

3.75 · 12 ratings

space-fleet · adult · dystopia · genetic-engineering · space · violent-conflict · military · galactic-empire · space-opera · soldiers · sci-fi · fiction · action-adventure · colonization · book · post-apocalyptic · ai · epic · war · mystery

All books in this series ❯