Grendel Unit: Similar series
Catteni
by Anne McCaffrey
3.96 · 124 ratings
adult · invasion · romance · violent-conflict · female-author · first-contact · space-opera · space-travel · sci-fi · aliens · fiction · action-adventure · futuristic · dystopia · space · audiobook · colonization · other-world · female-mc · survival
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The Protectorate
by Megan E. O'Keefe
4.03 · 53 ratings
genetic-engineering · space · adult · audiobook · military · violent-conflict · female-author · ai · space-opera · space-travel · suspense · sci-fi · action-adventure · aliens · exploration · fiction · book · lgbtq · mystery · female-mc
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Schools of Dune
by Brian Herbert
3.84 · 63 ratings
book · fiction · action-adventure · sci-fi · galactic-empire · space-opera · adult · space · colonization · epic · audiobook · classics · literary · genetic-engineering · literary-fiction · spirituality · religion · 21st-century
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Chanur
by C.J. Cherryh
4.10 · 105 ratings
space · cats · space-opera · sci-fi · adult · animals · aliens · fiction · invasion · violent-conflict · first-contact · female-author · action-adventure · audiobook · book · hard-sci-fi · anthologies · box-set · female-mc · literary
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Legacy Ship Trilogy
by Nick Webb
4.23 · 44 ratings
book · first-contact · technothriller · invasion · action-adventure · aliens · exploration · fiction · colonization · supernatural · space-travel · space-opera · galactic-empire · soldiers · sci-fi · violent-conflict · space · space-fleet · adult · audiobook
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In Her Name
by Michael R. Hicks
4.23 · 161 ratings
military · violent-conflict · sci-fi · space-opera · aliens · fiction · space · galactic-empire · first-contact · adult · invasion · book · action-adventure · war · epic · space-travel · warriors · dystopia · romance · post-apocalyptic
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Alex Benedict
by Jack McDevitt
3.75 · 137 ratings
fiction · action-adventure · adult · space-opera · sci-fi · book · space · audiobook · mystery · hard-sci-fi · aliens · first-contact · time-travel · crime · violent-conflict · military · space-travel · suspense · male-author · law-enforcement
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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
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Starfire
by Steve White
3.96 · 114 ratings
fiction · book · military · violent-conflict · space · adult · sci-fi · space-opera · war · audiobook · action-adventure · aliens · hard-sci-fi · technology · invasion · mystery · law-enforcement · earth
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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
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Forerunner
by Andre Norton
3.87 · 61 ratings
fiction · sci-fi · action-adventure · adult · book · space-opera · anthologies · young-adult · aliens · box-set · space · magic · workplace · shapeshifters · female-mc · classics · supernatural · single-planet · witches-wizards · pulp
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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
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The Book of Skaith
by Leigh Brackett
3.73 · 22 ratings
sword-sorcery · action-adventure · sci-fi · space-opera · female-author · anti-hero · adult · book · pulp · single-planet · aliens · fiction · sword-planet · space · 20th-century · mars · historical
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Halberd
by John Spearman
4.43 · 21 ratings
space-opera · military · space-fleet · fiction · action-adventure · adult · sci-fi · book · literary-fiction · romance · fantasy · violent-conflict · space
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Grand Central Arena
by Ryk E. Spoor
4.19 · 27 ratings
space-opera · book · sci-fi · space · action-adventure · adult · fiction · female-mc · super-powered · mystery · first-contact
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A Spacer Clan Adventure
by Mason Elliott
3.85 · 20 ratings
female-mc · action-adventure · fiction · book · military · violent-conflict · space · adult · sci-fi · galactic-empire · space-opera · psychics · war · soldiers
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Two Democracies: Revolution
by Alasdair C. Shaw
3.93 · 25 ratings
space-opera · fiction · book · military · space-fleet · adult · violent-conflict · space · sci-fi · ai · action-adventure · galactic-empire · soldiers · politics · revolution · post-apocalyptic · war · technology · genetic-engineering
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Maijstral
by Walter Jon Williams
4.04 · 23 ratings
action-adventure · fiction · humor · book · adult · sci-fi · comedy · space-opera · heist · mystery · urban · urban-fantasy · aliens · space · box-set
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Silent Order
by Jonathan Moeller
4.13 · 16 ratings
book · fiction · action-adventure · colonization · galactic-empire · space-opera · sci-fi · adult · space · espionage · political-intrigue · warriors · law-enforcement · mlm · romantic-love
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Morgan Selwood
by Greta van der Rol
3.89 · 9 ratings
aliens · fiction · sci-fi · space-opera · adult · book · romance · military · space · cyborgs · action-adventure · paranormal · enemies-to-lovers · galactic-empire · violent-conflict · space-fleet · invasion · slow-burn · futuristic · time-travel
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The Amaranthine Spectrum
by Tom Toner
3.44 · 9 ratings
space-opera · sci-fi · evolution · epic · far-future · historical · adult · space · military · book · steampunk · sword-sorcery · industrial-era · invasion · violent-conflict · futuristic · action-adventure · aliens · fiction · male-author
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The Journeys of McGill Feighan
by Kevin O'Donnell Jr.
4.00 · 7 ratings
space-fleet · adult · violent-conflict · military · space-opera · paranormal · fiction · action-adventure · humor · book · space · sci-fi · fantasy · literary-fiction
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The Epherium Chronicles
by T.D. Wilson
3.60 · 5 ratings
space · adult · violent-conflict · military · space-opera · soldiers · sci-fi · fiction · aliens · book · invasion · space-fleet · exploration · action-adventure · colonization · mystery · suspense
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Star Trek Corps of Engineers
by Ilsa J. Bick
3.88 · 8 ratings
action-adventure · genetic-engineering · violent-conflict · adult · aliens · fiction · military · book · space-opera · invasion · sci-fi · space · first-contact
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