43 books in series
The Horus Heresy - Black Library recommended reading order
The Horus Heresy - Black Library recommended reading order is a 52-book series with 43 released primary works first released in 2006 with contributions by Dan Abnett, Graham McNeill, Ben Counter, James Swallow, Mitchel Scanlon, Mike Lee, Aaron Dembski-Bowden, Gav Thorpe, Rob Sanders, David Annandale, John French, Nick Kyme, Chris Wraight, Guy Haley, Anthony Reynolds, John French, Matthew Farrer, and Andy Smillie.
| #1 |  Horus, SeƱor de la Guerra
| 4 | 1 read | ||
| #2 |  False Gods
| 3.9 | 80 reads | ||
| #3 |  Galaxy in Flames
| 3.96 | 66 reads | ||
| #4 |  The Flight of the Eisenstein
| 4.08 | 55 reads | ||
| #5 |  Fulgrim
| 3.48 | 36 reads | ||
| #6 |  Descent of Angels
| 3.48 | 28 reads | ||
| #7 |  Legion
| 4.39 | 31 reads | ||
| #8 |  Battle for the Abyss
| 3.07 | 23 reads | ||
| #9 |  Mechanicum
| 3.75 | 20 reads | ||
| #10 |  Tales of Heresy | 4 | 14 reads | ||
| #11 |  Fallen Angels
| 4 | 12 reads | ||
| #12 |  A Thousand Sons
| 4 | 20 reads | ||
| #13 |  Nemesis
| 4.11 | 15 reads | ||
| #14 |  The First Heretic
| 4.33 | 24 reads | ||
| #15 |  Prospero Brennt
| 4.11 | 17 reads | ||
| #16 |  Age of Darkness | 4.63 | 9 reads | ||
| #17 |  The Outcast Dead
| 3.5 | 8 reads | ||
| #18 |  Deliverance Lost
| 4.13 | 11 reads | ||
| #19 |  Know No Fear
| 4.33 | 11 reads | ||
| #19.6 |  The Honoured
| 4 | 1 read | ||
| #19.7 |  The Unburdened
| 3 | 2 reads | ||
| #20 |  The Primarchs | 3.25 | 6 reads | ||
| #20.5 |  Cybernetica
| 0 | 0 reads | ||
| #21 |  Fear to tread
| 3.57 | 9 reads | ||
| #22 |  Shadows of Treachery | 3.33 | 5 reads | ||
| #23 |  Angel Exterminatus
| 4 | 9 reads | ||
| #23.5 |  Tallarn: Executioner
| 0 | 0 reads | ||
| #23.7 |  Tallarn: Ironclad
| 0 | 0 reads | ||
| #24 |  Betrayer
| 4.58 | 10 reads | ||
| #25 |  Mark of Calth | 2.75 | 6 reads | ||
| #25.5 |  Promethean Sun Promethean Sun
| 5 | 2 reads | ||
| #25.6 |  Scorched Earth
| 0 | 1 read | ||
| #26 |  Vulkan Lives
| 3.67 | 7 reads | ||
| #27 |  The Unremembered Empire
| 4 | 8 reads | ||
| #28 |  Scars
| 4.33 | 6 reads | ||
| #29 |  Vengeful Spirit
| 3 | 4 reads | ||
| #30 |  The Damnation of Pythos
| 2.5 | 3 reads | ||
| #31 |  Legacies of Betrayal
| 0 | 2 reads | ||
| #32 |  Deathfire
| 2 | 2 reads | ||
| #33 |  War Without End | 0 | 2 reads | ||
| #34 |  Pharos
| 2.5 | 4 reads | ||
| #34.5 |  Meduson: Ultimate Edition
| 0 | 1 read | ||
| #34.6 |  The Seventh Serpent
| 0 | 0 reads | ||
| #35 |  Eye of Terra
| 0 | 1 read | ||
| #36 |  The Path of Heaven
| 4 | 3 reads | ||
| #37 |  The Silent War | 0 | 1 read | ||
| #38 |  Angels of Caliban
| 4 | 3 reads | ||
| #39 |  Praetorian of Dorn
| 3.38 | 6 reads | ||
| #40 |  Corax
| 0 | 1 read | ||
| #41 |  The Master of Mankind
| 3.8 | 7 reads | ||
| #42 |  Garro
| 4 | 5 reads | ||
| #43 |  Shattered Legions
| 1 | 3 reads | ||
| #44 |  The Crimson King
| 4 | 3 reads |