68 books in series
The Horus Heresy
The Horus Heresy is a 68-book series with 68 released primary works first released in 2004 with contributions by Dan Abnett, Graham McNeill, Ben Counter, James Swallow, Mitchel Scanlon, Mike Lee, Aaron Dembski-Bowden, Gav Thorpe, Nick Kyme, Chris Wraight, David Annandale, Guy Haley, Anthony Reynolds, John French, Matthew Farrer, Andy Smillie, John French, Rob Sanders, Rob Sanders, Michael F. Haspil, Gary Kloster, Nicholas Wolf, Noah Van Nguyen, and Chris Forrester.
| #1 |  Horus Rising
| 4.04 | 133 reads | ||
| #2 |  False Gods
| 3.86 | 84 reads | ||
| #3 |  Galaxy in Flames
| 3.89 | 70 reads | ||
| #4 |  The Flight of the Eisenstein
| 3.96 | 59 reads | ||
| #5 |  Fulgrim
| 3.44 | 39 reads | ||
| #6 |  Descent of Angels
| 3.48 | 31 reads | ||
| #7 |  Legion
| 4.38 | 32 reads | ||
| #8 |  Battle for the Abyss
| 3.06 | 24 reads | ||
| #9 |  Mechanicum
| 3.77 | 22 reads | ||
| #10 |  Tales of Heresy | 3.8 | 17 reads | ||
| #11 |  Fallen Angels
| 3.9 | 15 reads | ||
| #12 |  A Thousand Sons
| 3.97 | 22 reads | ||
| #13 |  Nemesis
| 4 | 17 reads | ||
| #14 |  The First Heretic
| 4.26 | 25 reads | ||
| #15 |  Prospero Burns
| 4 | 18 reads | ||
| #16 |  Age of Darkness | 4.3 | 11 reads | ||
| #17 |  The Outcast Dead
| 3.57 | 10 reads | ||
| #18 |  Deliverance Lost
| 4.11 | 13 reads | ||
| #19 |  Know No Fear
| 4.33 | 11 reads | ||
| #20 |  The Primarchs | 3.2 | 7 reads | ||
| #21 |  Fear to Tread
| 3.5 | 11 reads | ||
| #22 |  Shadows of Treachery | 3.25 | 6 reads | ||
| #23 |  Angel Exterminatus
| 3.83 | 10 reads | ||
| #24 |  Betrayer
| 4.36 | 11 reads | ||
| #25 |  Mark of Calth | 2.8 | 7 reads | ||
| #26 |  Vulkan Lives
| 3.5 | 8 reads | ||
| #27 |  The Unremembered Empire
| 3.86 | 9 reads | ||
| #28 |  Scars
| 4.25 | 7 reads | ||
| #29 |  Vengeful Spirit
| 3.33 | 5 reads | ||
| #30 |  The Damnation of Pythos
| 2.67 | 4 reads | ||
| #31 |  Legacies of Betrayal
| 3 | 3 reads | ||
| #32 |  Deathfire
| 2 | 3 reads | ||
| #33 |  War Without End | 2 | 3 reads | ||
| #34 |  Pharos
| 2.67 | 5 reads | ||
| #35 |  Eye of Terra
| 3 | 2 reads | ||
| #36 |  The Path of Heaven
| 4 | 4 reads | ||
| #37 |  The Silent War | 3 | 2 reads | ||
| #38 |  Angels of Caliban
| 3.17 | 5 reads | ||
| #39 |  Praetorian of Dorn
| 3.7 | 7 reads | ||
| #40 |  Corax
| 3 | 2 reads | ||
| #41 |  The Master of Mankind
| 3.83 | 8 reads | ||
| #42 |  Garro
| 4 | 5 reads | ||
| #43 |  Shattered Legions
| 2 | 4 reads | ||
| #44 |  The Crimson King
| 3.5 | 4 reads | ||
| #45 |  Tallarn
| 4 | 4 reads | ||
| #46 |  Ruinstorm
| 2.33 | 5 reads | ||
| #47 |  Old Earth
| 2 | 4 reads | ||
| #48 |  The Burden of Loyalty
| 4 | 4 reads | ||
| #49 |  Wolfsbane
| 3.5 | 4 reads | ||
| #50 |  Born of Flame
| 3 | 3 reads | ||
| #51 |  Slaves to Darkness
| 3.5 | 6 reads | ||
| #52 |  Heralds of the Siege
| 3.5 | 4 reads | ||
| #53 |  Titandeath
| 3 | 3 reads | ||
| #54 |  The Buried Dagger
| 4.5 | 4 reads | ||
 Cthonia's Reckoning Cthonia's Reckoning
| 2 | 2 reads | |||
 The First Wall
| 2.58 | 9 reads | |||
 Fury of Magnus
| 3.75 | 6 reads | |||
 The Solar War
| 3.71 | 9 reads | |||
 The Lost and the Damned, Volume 3
| 0 | 0 reads | |||
 Sons of the Selenar
| 2.5 | 3 reads | |||
 Cthonia’s Reckoning
| 0 | 0 reads | |||
 Saturnine
| 4.67 | 10 reads | |||
 Mortis
| 3.4 | 7 reads | |||
 The Lost and the Damned
| 3.42 | 9 reads | |||
 Warmaster
| 4 | 1 read | |||
 The End and the Death: Volume I
| 4.42 | 9 reads | |||
 Lupercal's War
| 4 | 2 reads | |||
 Garro: Knight of Grey
| 4.33 | 3 reads | |||
 Warhawk
| 3.4 | 7 reads |