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. 3
    Hell Divers Series series cover

    Hell Divers Series

    by Nicholas Sansbury Smith

    21h 54m total 3 books 4.59 avg
  2. 4
    Dungeon Crawler Carl series cover

    Dungeon Crawler Carl

    by Matt Dinniman

    54h 20m total 3 books 4.58 avg
  3. 6
    Remembrance of Earth's Past series cover

    Remembrance of Earth's Past

    by Liu Cixin, Joel Martinsen

    64h 53m total 3 books 4.45 avg
  4. 7
    The Ripple System series cover

    The Ripple System

    by Kyle Kirrin

    54h 14m total 3 books 4.42 avg
  5. 9
    The Murderbot Diaries series cover

    The Murderbot Diaries

    by Martha Wells

    17h total 4 books 4.42 avg
  6. 10
    System Universe series cover

    System Universe

    by SunriseCV

    88h 33m total 6 books 4.41 avg
  7. 12
    Hyperion Cantos series cover

    Hyperion Cantos

    by Dan Simmons, Gary Ruddell

    74h 49m total 3 books 4.37 avg
  8. 13
    Foundation (Publication Order) series cover

    Foundation (Publication Order)

    by Isaac Asimov

    66h 13m total 5 books 4.37 avg
  9. 14
    Ruins of the Earth series cover

    Ruins of the Earth

    by Christopher Hopper, J.N. Chaney

    33h 3m total 3 books 4.36 avg
  10. 15
    Tyrus Rechs: Contracts & Terminations series cover

    Tyrus Rechs: Contracts & Terminations

    by Jason Anspach, Nick Cole

    29h 41m total 3 books 4.35 avg
  11. 16
    The Interdependency series cover

    The Interdependency

    by John Scalzi

    25h 50m total 3 books 4.33 avg
  12. 18
    Wild Wastes series cover

    Wild Wastes

    by Randi Darren

    38h 20m total 3 books 4.31 avg
  13. 20
    Antecedents' Legacy series cover
  14. 21
    The Ember War Saga series cover

    The Ember War Saga

    by Richard Fox

    51h 43m total 5 books 4.27 avg
  15. 22
    The Passage series cover

    The Passage

    by Justin Cronin

    92h 41m total 3 books 4.25 avg
  16. 24
    Wayward Galaxy series cover

    Wayward Galaxy

    by Jason Anspach, J.N. Chaney

    58h 50m total 5 books 4.25 avg
  17. 26
    The Fear Saga series cover

    The Fear Saga

    by Stephen Moss

    58h 18m total 3 books 4.22 avg
  18. 29
    Night's Dawn series cover

    Night's Dawn

    by Peter F. Hamilton

    130h 5m total 3 books 4.19 avg
  19. 30
    The Shadow series cover

    The Shadow

    by Orson Scott Card

    31h 36m total 3 books 4.18 avg