Best Sci-Fi Book Series

The best science fiction book series ranked by average reader rating — the series that stay consistently great from first book to last.

The best sci-fi series aren't just the longest — they're the ones that stay good. This list ranks science fiction book series by average reader rating across all installments, so a trilogy that nails every book outranks a 10-book saga that loses steam halfway through.

Every series here has at least 3 books in our catalog. Whether you're looking for a complete set to binge or an ongoing series worth catching up on, these are the sci-fi series readers consistently rate highest.

1

Antecedents' Legacy

by Daniel Schinhofen

42h 22m total 4 books ★ 4.67 avg

Books in series:

#1 Antecedents' Legacy, #2 MX Hub, #3 Terran Tactics (Antecedents' Legacy Book 3), #5 Assembly's Folly (Antecedents' Legacy Book 5)
2

Dragon Host

by Timothy Ellis

18h 58m total 3 books ★ 4.63 avg

Books in series:

#1 Dragon Rider, #4 Dragon Nemesis, #5 Dragon Squared
3

Dungeon Crawler Carl

by Matt Dinniman

54h 20m total 3 books ★ 4.55 avg

Books in series:

#1 Dungeon Crawler Carl, #2 L'Ogive du Jugement dernier, #7 This Inevitable Ruin
4

Welcome to the Multiverse

by Sean Oswald, Joshua Mason

144h 34m total 9 books ★ 4.51 avg

Books in series:

#1 Induction, #2 Countdown, #3 Collapse, #4 Resistance, #5 Contention: A Litrpg Apocalypse (Welcome to the Multiverse Book 5), #6 Control: Welcome to the Multiverse, #7 Invasion: A Litrpg Apocalypse (Welcome to the Multiverse Book 7), #9 Divergence: A Litrpg Apocalypse, #10 Exploration: A Litrpg Apocalypse
5

Middle Falls Time Travel

by Shawn Inmon

28h 51m total 3 books ★ 4.50 avg

Books in series:

#4 The Final Life of Nathaniel Moon, #18 The Tumultuous Lives of Karl Strong, #22 The Indomitable Lives of Tuesday West
6

The Ripple System

by Kyle Kirrin

54h 14m total 3 books ★ 4.49 avg

Books in series:

#3 Gilded Ghost, #5 Emperor's End, #6 Lunatic's Landing
7

Red Rising

by Pierce Brown

118h 7m total 6 books ★ 4.45 avg

Books in series:

#1 Red Rising, #1 Red Rising (Part 1 of 2) (Dramatized Adaptation), #2 Golden Son, #3 Morning Star, #4 Iron Gold, #6 Light Bringer
8

System Universe

by SunriseCV

88h 33m total 6 books ★ 4.45 avg

Books in series:

#2 Torith, #3 Savannah, #4 Trials of Cydaria, #5 System Interference, #6 Indaria, #7 Requirements
9

Tyrus Rechs: Contracts & Terminations

by Jason Anspach, Nick Cole

29h 41m total 3 books ★ 4.44 avg

Books in series:

#1 Requiem for Medusa, #2 Chasing the Dragon, #3 Madame Guillotine
10

Oath of the Survivor

by James Meyer

39h 14m total 3 books ★ 4.44 avg

Books in series:

#1 Oath of the Survivor: A LitRPG Apocalypse, #2 Oath of the Survivor 2: A LitRPG Apocalypse, #3 Oath of the Survivor 3: A LitRPG Apocalypse
11

Arisen

by Michael Stephen Fuchs

68h 14m total 7 books ★ 4.43 avg

Books in series:

#4 Maximum Violence, #6 The Horizon, #7 Death of Empires, #9 Cataclysm, #10 The Flood, #12 Carnage, #13 The Siege
12

Forgotten Starship

by M.R. Forbes

58h 17m total 5 books ★ 4.43 avg

Books in series:

#1 Exodus, #2 Emerge, #3 Entropy, #4 Endure, #5 Evolve
13

Wayward Galaxy

by Jason Anspach, J.N. Chaney

58h 50m total 5 books ★ 4.42 avg

Books in series:

#3 Wayward Galaxy 3, #4 Wayward Galaxy 4, #5 Wayward Galaxy 5, #6 Wayward Galaxy 6, #7 Wayward Earth
14

Ruins of the Earth

by Christopher Hopper, J.N. Chaney

33h 3m total 3 books ★ 4.42 avg

Books in series:

#2 Gods and Men, #3 Phantom Deadfall, #4 Decayed Legacy
15

Expeditionary Force

by Craig Alanson

224h 26m total 12 books ★ 4.41 avg

Books in series:

#1 Columbus Day, #2 SpecOps, #3 Paradise, #4 Black Ops, #5 Zero Hour, #13 Fallout, #14 Match Game, #15 Failure Mode, #16 Aftermath, #17 Task Force Hammer, #18 Gateway, #19 Ground State
16

Wild Wastes

by Randi Darren, William D. Arand

38h 20m total 3 books ★ 4.41 avg

Books in series:

#2 Eastern Expansion, #3 Southern Storm, #4 Wild Wastes 4
17

Galaxy's Edge

by Jason Anspach, Nick Cole

83h 54m total 8 books ★ 4.36 avg

Books in series:

#1 Legionnaire, #2 Galactic Outlaws, #3 Kill Team, #4 Attack of Shadows, #6 Sword of the Legion, #8 Turning Point, #15 Galaxy's Edge Part VI: Takeover (Galaxy's Edge Series, 6), #19 The Wanted
18

Bobiverse

by Dennis E. Taylor

55h 29m total 5 books ★ 4.32 avg

Books in series:

#1 We Are Legion (We Are Bob), #2 For We Are Many, #3 All These Worlds, #4 Heaven's River, #5 Not Till We Are Lost
19

Nick Hall

by Douglas E. Richards, Adam Verner

48h 27m total 4 books ★ 4.32 avg

Books in series:

#1 Mind's Eye, #2 BrainWeb, #3 Mind War (Nick Hall, 3), #4 Unleashed (Nick Hall Book 4)
20

The System Apocalypse: Australia

by Tao Wong, K.T. Hanna

37h 58m total 3 books ★ 4.31 avg

Books in series:

#1 Town Under, #2 Flat Out, #3 Bloody Oath
21

Silver Ships

by S.H. Jucha

134h 8m total 11 books ★ 4.29 avg

Books in series:

#1 The Silver Ships, #2 Libre, #3 Méridien, #4 Haraken, #5 Sol, #6 Espero, #7 Allora, #8 Celus-5, #9 Omnia, #10 Vinium, #12 Artifice
22

Remembrance of Earth's Past

by Liu Cixin, Joel Martinsen

64h 53m total 3 books ★ 4.29 avg

Books in series:

#1 The Three-Body Problem, #2 The Dark Forest, #3 Death's End
23

From Beyond

by Jasper T. Scott, Nathan Hystad

25h 1m total 3 books ★ 4.28 avg

Books in series:

#1 From Beyond, #2 Signal, #3 Survival
24

The Expanse

by James S. A. Corey

162h 1m total 9 books ★ 4.26 avg

Books in series:

#1 Leviathan Wakes, #2 Calibans Krieg, #2 Gods of Risk, #3 Abaddon’s Gate, #3 Abaddon's Gate. La fuga, #4 Cibola Burn, #5 Nemesis Games, #6 Babylon’s Ashes, #7 Persepolis Rising
25

Commune

by Joshua Gayou

114h 40m total 7 books ★ 4.22 avg

Books in series:

#1 Commune: Book One, #2 Commune: Book Two, #3 Commune: Book Three, #4 Commune: Book Four, #5 The Battle of D.C., #6 The Slavers of Grand Saline, #7 Commune 7: Bloody Sun (Commune Series)
26

The Ember War Saga

by Richard Fox

51h 43m total 5 books ★ 4.22 avg

Books in series:

#1 The Ember War, #3 Blood of Heroes, #4 Earth Defiant, #6 The Battle of the Void, #7 The Siege of Earth
27

What If?

by Randall Munroe

20h 39m total 3 books ★ 4.22 avg

Books in series:

#1 What If?, #1 What If? 10th Anniversary Edition, #2 What If? 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions
28

The Bridge Sequence

by Nathan Hystad

28h 45m total 3 books ★ 4.22 avg

Books in series:

#1 Lost Contact, #2 Lost Time, #3 Lost Hope
29

The Murderbot Diaries

by Martha Wells

17h total 4 books ★ 4.21 avg

Books in series:

#1 All Systems Red, #2 Artificial Condition, #3 Rogue Protocol, #7 System Collapse
30

Foundation (Publication Order)

by Isaac Asimov

66h 13m total 5 books ★ 4.20 avg

Books in series:

#2 Foundation and Empire, #3 Second Foundation, #4 Foundation's Edge, #6 Prelude to Foundation, #7 Forward the Foundation

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