Key facts about Guy Haley
Guy Haley has 15 books on our list. 13 of them belong to a series, while 2 stand alone. Since all 15 are out now, every book here is ready to read. Their series sit on our science fiction and science fantasy shelves.
Guy Haley has 5 series on file. The Horus Heresy has 54 books, while Richards & Klein has 2 books. Dreaming Cities has 2 books, starting in 2016.
Dark Imperium has 3 books, starting in 2018. Belisarius Cawl has 3 books, starting in 2019. In particular, The Horus Heresy is the longest series on file. The Horus Heresy began with Aaron Dembski-Bowden, while Guy Haley has books in it too.
The Horus Heresy starts with Horus Rising, while Richards & Klein starts with Reality 36. Dreaming Cities starts with The Emperor's Railroad.
Since The Horus Heresy is the first series on file, it is the place to start. Their first published book on file came out in 2011. Meanwhile, Archmagos is the latest published book, out on 21 November 2025.
There are also 2 standalone books. You can read them in any order, since each one stands alone. The newest one that is out is Crash, from 2013. The oldest on file is Champion of Mars, from 2012.