64 books in series
The Horus Heresy
The Horus Heresy is a 64-book series with 64 primary works first released in 2004 with contributions by Dan Abnett, Graham McNeill, James Swallow, Mitchel Scanlon, Ben Counter, Mike Lee, Gav Thorpe, Nick Kyme, Chris Wraight, David Annandale, Guy Haley, Aaron Dembski-Bowden, John French, Anthony Reynolds, Matthew Farrer, Andy Smillie, Rob Sanders, Michael F. Haspil, Gary Kloster, Nicholas Wolf, Noah Van Nguyen, and Chris Forrester.
| #1 |  Horus Rising
| 4.03 | 80 reads | ||
| #2 |  False Gods
| 3.92 | 44 reads | ||
| #4 |  The Flight of the Eisenstein
| 4.16 | 27 reads | ||
| #5 |  Fulgrim
| 3.46 | 18 reads | ||
| #6 |  Descent of Angels
| 3.42 | 16 reads | ||
| #7 |  Legion
| 4.45 | 17 reads | ||
| #8 |  Battle for the Abyss
| 3.39 | 12 reads | ||
| #9 |  Mechanicum
| 3.86 | 11 reads | ||
| #10 |  Tales of Heresy | 4.2 | 6 reads | ||
| #11 |  Fallen Angels
| 4.25 | 6 reads | ||
| #12 |  A Thousand Sons
| 3.89 | 9 reads | ||
| #13 |  Nemesis
| 3.8 | 7 reads | ||
| #15 |  Prospero Burns : the wolves unleashed
| 4.29 | 9 reads | ||
| #16 |  Age of Darkness | 4.5 | 4 reads | ||
| #17 |  The Outcast Dead
| 3.25 | 4 reads | ||
| #18 |  Deliverance Lost
| 4 | 7 reads | ||
| #19 |  Know No Fear (The Horus Heresy, #19)
| 4.17 | 8 reads | ||
| #20 |  The Primarchs | 3.33 | 3 reads | ||
| #21 |  Fear to tread
| 3.25 | 4 reads | ||
| #22 |  Shadows of Treachery | 3.5 | 2 reads | ||
| #23 |  Angel Exterminatus
| 4 | 5 reads | ||
| #25 |  Mark of Calth | 2.5 | 2 reads | ||
| #26 |  Vulkan Lives
| 3.5 | 3 reads | ||
| #27 |  The Unremembered Empire
| 3.67 | 3 reads | ||
| #28 |  Scars
| 4.5 | 3 reads | ||
| #29 |  Vengeful Spirit
| 3 | 2 reads | ||
| #30 |  The Damnation of Pythos
| 2.5 | 2 reads | ||
| #31 |  Legacies of Betrayal
| 0 | 0 reads | ||
| #32 |  Deathfire
| 2 | 1 read | ||
| #33 |  War Without End | 0 | 0 reads | ||
| #34 |  Pharos
| 2.5 | 2 reads | ||
| #35 |  Eye of Terra
| 0 | 0 reads | ||
| #36 |  The Path of Heaven
| 4 | 1 read | ||
| #37 |  The Silent War | 0 | 0 reads | ||
| #38 |  Angels of Caliban
| 4 | 1 read | ||
| #39 |  Praetorian of Dorn
| 3 | 2 reads | ||
| #40 |  Corax
| 0 | 0 reads | ||
| #41 |  The Master of Mankind
| 3.67 | 4 reads | ||
| #42 |  Garro
| 4 | 3 reads | ||
| #43 |  Shattered Legions
| 1 | 1 read | ||
| #44 |  The Crimson King
| 4 | 1 read | ||
| #45 |  Tallarn
| 4 | 1 read | ||
| #46 |  Ruinstorm
| 2 | 2 reads | ||
| #47 |  Old Earth
| 1 | 1 read | ||
| #48 |  The Burden of Loyalty
| 5 | 1 read | ||
| #49 |  Wolfsbane
| 3 | 1 read | ||
| #50 |  Born of Flame
| 0 | 0 reads | ||
| #51 |  Slaves to Darkness
| 4 | 2 reads | ||
| #53 |  Titandeath
| 0 | 0 reads | ||
| #54 |  The Buried Dagger
| 5 | 1 read | ||
 Garro: Knight of Grey
| 4 | 1 read | |||
 Cthonia’s Reckoning
| 0 | 0 reads | |||
 The End and the Death: Volume I
| 5 | 3 reads | |||
 The Solar War
| 4 | 3 reads | |||
 Lupercal's War
| 4 | 2 reads | |||
 The Lost and the Damned
| 3 | 3 reads | |||
 Sons of the Selenar
| 1 | 1 read | |||
 Saturnine
| 5 | 3 reads | |||
 Fury of Magnus
| 3.33 | 3 reads | |||
 The First Wall
| 1.5 | 3 reads | |||
 Cthonia's Reckoning Cthonia's Reckoning
| 2 | 2 reads | |||
 Warhawk
| 3.33 | 4 reads | |||
 Warmaster
| 4 | 1 read | |||
 Mortis
| 3.33 | 4 reads |