Science Fiction

Like what you're reading? Join the club.
Join the Centsless Book Club to get free books, exclusive content, and more in your inbox every Monday, Wednesday, and Friday. Subscribe, and you'll never miss another freebie or gift card giveaway again. Oh, and it's free.
Like free books? You'll love free audiobooks.
Centsless Books highly recommends signing up for a free trial of Audible. It's insanely popular among avid readers and has all of the bestselling titles. You can cancel anytime and keep your free ebooks forever.
Download Free Audiobooks Now

  1. Check it Out! The Legacy Human (Singularity Series Book 1)
  2. Check it Out! Starship Honor (Honor in Exile Book 1)
  3. Check it Out! The Wingless Angel
  4. Check it Out! Genesis Code: A Dystopian Society Thriller (Book 1, Genesis Series)
  5. Check it Out! Alien Captain's Bride: (Alien Warrior Romance) (Timegate Mars Book 1)
  6. Check it Out! Closed Campus: A First Person Zombie Experience (Jane Zombie Chronicles Book 1)
  7. Check it Out! The Night Raven (Crow Investigations Book 1)
  8. Check it Out! Counter Strike: The Empire Responds – Military Sci Fi and Space Opera Thriller (Galactic Rebels Book 2)
  9. Check it Out! The Sunken: a dark steampunk fantasy (Engine Ward Book 1)
  10. Check it Out! Siren's Cove: Perigalacticon Series Book 1 (The Perigalacticon Series)
  11. Check it Out! Prince of the Fallen (Record of the Sentinel Seer Book 1)
  12. Check it Out! Revolution (Wealth of Time Prequel #1)
  13. Check it Out! Surviving the Evacuation: Outback Outbreak: Surviving the Evacuation (Life Goes On Book 1)
  14. Check it Out! Tipping Point (Project Renova Book 1)
  15. Check it Out! War Dog: A Code of War Novella (The Code of War)
  16. Check it Out! Almond City Ashes (Wrenn Grayson Mystery Book 5)
  17. Check it Out! The Trickster's Tale: Is That a Lute in Your Pocket?: (A LitRPG Adventure) (The Tricksters Tale Book 1)
  18. Check it Out! Here There Be Monsters
  19. Check it Out! The Invisible Man
  20. Check it Out! Guardian (Royal Guard Series Book 1)
  21. Check it Out! When You Had Power (Nothing is Promised 1)
  22. Check it Out! Time Burrito
  23. Check it Out! Ashes of the Fall (The Remnants Trilogy Book 1)
  24. Check it Out! Death in Deep Space: Military Sci-Fi
  25. Check it Out! The Chessmen of Mars (Barsoom)
  26. Check it Out! Z2134
  27. Check it Out! 2084: Book One: 2069
  28. Check it Out! Empire Under a Dying Sun
  29. Check it Out! The Survivors (Life After War Book 1)
  30. Check it Out! Queen of Egypt (The Amarna Age Book 1)
  31. Check it Out! The Chessmen of Mars (Barsoom)
  32. Check it Out! When You Had Power (Nothing is Promised 1)
  33. Check it Out! Starshine: Aurora Rising Book One (Amaranthe 1)
  34. Check it Out! VALOR (Unconquered Stars Book 1)
  35. Check it Out! Starshot: A Science Fiction Adventure Series (The Skyward Saga Book 1)
  36. Check it Out! The Gates: An Apocalyptic Horror Novel (Hell on Earth Book 1)
  37. Check it Out! Call of Courage: 7 Novels of the Galactic Frontier
  38. Check it Out! The Dragon Blood Collection, Books 1-3
  39. Check it Out! Surviving Chaos: A Post-Apocalyptic EMP Survival Thriller (End of Days Prequel)
  40. Check it Out! Tokens and Towers: (A LitRPG Fantasy Adventure)
  41. Check it Out! Lights in a Dark Sky (The Republic Chronicles)
  42. Check it Out! Kingdom of Ash and Soot (The Order of the Crystal Daggers Book 1)
  43. Check it Out! The Mages of Starsea (The Starsea Cycle Book 1)
  44. Check it Out! Knights, Witches, and Murder: A Fantasy Murder Mystery and Paranormal Thriller with Suspense (Fantasy: A Calec of the Woods M
  45. Check it Out! The Girl Who Sees (Sasha Urban Series Book 1)
  46. Check it Out! Stalked by Flames: Book 1 (Dragon's Breath Series)
  47. Check it Out! God School (Divine Protector Book 1)
  48. Check it Out! Da Vinci On The Lam
  49. Check it Out! The Left Hand of Dog: An extremely silly tale of alien abduction (Starship Teapot Book 1)
  50. Check it Out! Right Ascension (The Sector Fleet, Book 3)
  51. Check it Out! Outlaw Rising: A Parse Galaxy Novella (.5)
  52. Check it Out! Fallen Star (Project Gauntlet Book 1)
  53. Check it Out! The Survivors (Life After War Book 1)
  54. Check it Out! The Forgotten Sky: A Sci Fi Fantasy Space Opera set in a Dystopian Galactic Empire (The Crown of Dreams Series Book 1)
  55. Check it Out! Death in Deep Space: Military Sci-Fi
  56. Check it Out! Daughter of Time (The After Cilmeri Series Book 1)
  57. Check it Out! Through the Looking Lens
  58. Check it Out! Nona the Ninth Sneak Peek
  59. Check it Out! The Lunar Deception (The Moon Colony Series Book 1)
  60. Check it Out! Arkship Obsidian (The Arkship Saga Book 1)
  61. Check it Out! Morna's Legacy: Books 1, 2, 2.5 & 3: Scottish, Time Travel Romances (Morna's Legacy Collections)
  62. Check it Out! Ghost Probe: A Humorous Sci-Fi Adventure (SPACE GH0ST ADVENTURES Book 1)
  63. Check it Out! Birth Of The Phoenix (Rise Of The Phoenix Book 1)
  64. Check it Out! Princess Celesti 1: Reverse Harem Fantasy
  65. Check it Out! Lake Of Sins: Escape: A YA dystopian adventure like no other.
  66. Check it Out! Stopover at the Backworlds' Edge
  67. Check it Out! ZERO (Helix Book 10)
  68. Check it Out! Nona the Ninth Sneak Peek
  69. Check it Out! The Pattern Ship (The Pattern Universe Book 1)
  70. Check it Out! Surviving Chaos: A Post-Apocalyptic EMP Survival Thriller (End of Days Prequel)
  71. Check it Out! Forager - A Post-Apocalyptic/Dystopian Thriller (Forager - A Dystopian Trilogy Book 1)
  72. Check it Out! The First Run: A Space Opera Adventure (The Sea of Stars Book 1)
  73. Check it Out! A Study in Time
  74. Check it Out! Dark Nebula: Isolation
  75. Check it Out! The Time the Silence Fell
  76. Check it Out! Queen of Egypt (The Amarna Age Book 1)
  77. Check it Out! The Becoming: A Post-Apocalyptic Zombie Thriller (The Becoming Series Book 1)
  78. Check it Out! The War of the Worlds
  79. Check it Out! The Mages of Starsea (The Starsea Cycle Book 1)
  80. Check it Out! Run and Hide! - A Gripping Conspiracy Thriller: (Book One - The Orlando File)
  81. Check it Out! Where Willows Won't Grow
  82. Check it Out! Knights, Witches, and Murder: A Fantasy Murder Mystery and Paranormal Thriller with Suspense (Fantasy: A Calec of the Woods M
  83. Check it Out! The Forgotten Sky: A Sci Fi Fantasy Space Opera set in a Dystopian Galactic Empire (The Crown of Dreams Series Book 1)
  84. Check it Out! Fire with Fire (Caine Riordan Book 1)
  85. Check it Out! Eros Element (Aether Psychics Book 1)
  86. Check it Out! Guardian (Royal Guard Series Book 1)
  87. Check it Out! The Dragon Blood Collection, Books 1-3
  88. Check it Out! Age of Wolves: An urban fantasy romance (Fated Book 1)
  89. Check it Out! Infinity: A Bridger's Origin (Bridgers Series)
  90. Check it Out! Raptor Ray: Epic Sci Fi!
  91. Check it Out! Surviving The Evacuation, Book 1: London
  92. Check it Out! Dino Crisis - Stranded Illustrated (Dino Crisis - Illustrated Book 1)
  93. Check it Out! Space Colony One Books 1 - 3 (SPACE COLONY ONE SERIES)
  94. Check it Out! The Magnus Maximus Trilogy 3: Books 7-9: Battles in the Basin, The Conquest of Zacatecas, & Berbers and Bedouins
  95. Check it Out! Demon Cursed
  96. Check it Out! The Spirit Child (Seven Realms of Ar'rothi Book 1)
  97. Check it Out! Standish: The Earth Saga Universe
  98. Check it Out! The Left Hand of Dog: An extremely silly tale of alien abduction (Starship Teapot Book 1)
  99. Check it Out! Alien Lord's Captive (Warriors of the Lathar Book 1)
  100. Check it Out! Anchor Leg: A Sci-Fi Mystery Novel