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

Red Rising

by Pierce Brown

118h 7m total 6 books ★ 4.63 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
2

Bobiverse

by Dennis E. Taylor

55h 29m total 5 books ★ 4.60 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
3

Hell Divers Series

by Nicholas Sansbury Smith

21h 54m total 3 books ★ 4.59 avg

Books in series:

#1 Hell Divers: The Lost Years, #2 Hell Divers II: Ghosts, #3 Hell Divers III: Deliverance
4

Dungeon Crawler Carl

by Matt Dinniman

54h 20m total 3 books ★ 4.58 avg

Books in series:

#1 Dungeon Crawler Carl, #2 L'Ogive du Jugement dernier, #7 This Inevitable Ruin
5

Expeditionary Force

by Craig Alanson

224h 26m total 12 books ★ 4.57 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
6

Remembrance of Earth's Past

by Liu Cixin, Joel Martinsen

64h 53m total 3 books ★ 4.45 avg

Books in series:

#1 The Three-Body Problem, #2 The Dark Forest, #3 Death's End
7

The Ripple System

by Kyle Kirrin

54h 14m total 3 books ★ 4.42 avg

Books in series:

#3 Gilded Ghost, #5 Emperor's End, #6 Lunatic's Landing
8

Arisen

by Michael Stephen Fuchs

83h 32m total 8 books ★ 4.42 avg

Books in series:

#1 Arisen Omnibus Edition: Books 1-3, #4 Maximum Violence, #6 The Horizon, #7 Death of Empires, #9 Cataclysm, #10 The Flood, #12 Carnage, #13 The Siege
9

The Murderbot Diaries

by Martha Wells

17h total 4 books ★ 4.42 avg

Books in series:

#1 All Systems Red, #2 Artificial Condition, #3 Rogue Protocol, #7 System Collapse
10

System Universe

by SunriseCV

88h 33m total 6 books ★ 4.41 avg

Books in series:

#2 Torith, #3 Savannah, #4 Trials of Cydaria, #5 System Interference, #6 Indaria, #7 Requirements
11

Welcome to the Multiverse

by Sean Oswald

144h 34m total 9 books ★ 4.38 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
12

Hyperion Cantos

by Dan Simmons, Gary Ruddell

74h 49m total 3 books ★ 4.37 avg

Books in series:

#2 The Fall of Hyperion, #3 Endymion, #4 The Rise of Endymion
13

Foundation (Publication Order)

by Isaac Asimov

66h 13m total 5 books ★ 4.37 avg

Books in series:

#2 Foundation and Empire, #3 Second Foundation, #4 Foundation's Edge, #6 Prelude to Foundation, #7 Forward the Foundation
14

Ruins of the Earth

by Christopher Hopper, J.N. Chaney

33h 3m total 3 books ★ 4.36 avg

Books in series:

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

Tyrus Rechs: Contracts & Terminations

by Jason Anspach, Nick Cole

29h 41m total 3 books ★ 4.35 avg

Books in series:

#1 Requiem for Medusa, #2 Chasing the Dragon, #3 Madame Guillotine
16

The Interdependency

by John Scalzi

25h 50m total 3 books ★ 4.33 avg

Books in series:

#1 The Collapsing Empire, #2 The Consuming Fire, #3 The Last Emperox
17

Pern

by Anne McCaffrey

123h 18m total 9 books ★ 4.32 avg

Books in series:

#2 Dragonquest, #5 The White Dragon, #9 Dragonsdawn, #10 The Renegades of Pern)] published on (March, 1991), #11 All the Weyrs of Pern, #13 Dragonseye, #14 The Masterharper of Pern, #15 The Skies of Pern, #16 Dragon's Kin
18

Wild Wastes

by Randi Darren

38h 20m total 3 books ★ 4.31 avg

Books in series:

#2 Eastern Expansion, #3 Southern Storm, #4 Wild Wastes 4
19

The Expanse

by James S.A. Corey

182h 50m total 10 books ★ 4.30 avg

Books in series:

#1 Leviathan Wakes, #2 Calibans Krieg, #2 Gods of Risk, #2 Caliban - La guerra, #3 Abaddon’s Gate, #3 Abaddon's Gate. La fuga, #4 Cibola Burn, #5 Nemesis Games, #6 Babylon’s Ashes, #7 Persepolis Rising
20

Antecedents' Legacy

by Daniel Schinhofen

42h 22m total 4 books ★ 4.27 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)
21

The Ember War Saga

by Richard Fox

51h 43m total 5 books ★ 4.27 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
22

The Passage

by Justin Cronin

92h 41m total 3 books ★ 4.25 avg

Books in series:

#1 The Passage, #2 The Twelve, #3 The City of Mirrors
23

What If?

by Randall Munroe

20h 39m total 3 books ★ 4.25 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
24

Wayward Galaxy

by Jason Anspach, J.N. Chaney

58h 50m total 5 books ★ 4.25 avg

Books in series:

#3 Wayward Galaxy 3, #4 Wayward Galaxy 4, #5 Wayward Galaxy 5, #6 Wayward Galaxy 6, #7 Wayward Earth
25

Vorkosigan Saga (Publication Order)

by Lois McMaster Bujold

159h 30m total 13 books ★ 4.24 avg

Books in series:

#1 Scherben der Ehre, #1 Shards of Honor, #3 Ethan of Athos, #4 Falling Free, #5 Brothers in Arms, #8 Mirror Dance, #9 Cetaganda, #10 Memory, #11 Komarr, #12 A Civil Campaign, #13 Diplomatic Immunity, #15 Captain Vorpatril's Alliance +1 more
26

The Fear Saga

by Stephen Moss

58h 18m total 3 books ★ 4.22 avg

Books in series:

#1 Fear the Sky, #2 Fear the Survivors, #3 Fear the Future
27

Halo

by Eric S. Nylund

224h 20m total 20 books ★ 4.22 avg

Books in series:

#1 Halo: The Fall of Reach, #4 Halo: Ghosts of Onyx, #5 Halo: Contact Harvest, #6 Halo: The Cole Protocol, #11 Halo: Glasslands, #12 Halo: The Thursday War, #13 Halo: Mortal Dictata, #14 Halo: Broken Circle, #15 New Blood, #17 Halo: Saint's Testimony, #18 Halo: Last Light, #19 Halo: Fractures - Extraordinary Tales from the Halo Canon +8 more
28

Commune

by Joshua Gayou

114h 40m total 7 books ★ 4.19 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)
29

Night's Dawn

by Peter F. Hamilton

130h 5m total 3 books ★ 4.19 avg

Books in series:

#1 The Reality Dysfunction, #2 The Neutronium Alchemist, #3 The Naked God
30

The Shadow

by Orson Scott Card

31h 36m total 3 books ★ 4.18 avg

Books in series:

#2 Shadow of the Hegemon, #3 Ender's Shadow, #5 Shadows in Flight

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