Author

Guy Haley

Guy Haley has 15 known credited books (15 published) across 5 series. Start with The Horus Heresy. Guy Haley contributes to The Horus Heresy (created by Aaron Dembski-Bowden).

Guy Haley is an English writer of speculative fiction, born in Halifax, Yorkshire in 1973. Before turning to fiction full-time he worked as a magazine editor and writer for SFX, White Dwarf and Death Ray, giving him an insider's grounding in genre fandom and gaming culture. He has since published more than 50 novels and novellas, including original science fiction such as Champion of Mars and the Richards and Klein and Dreaming Cities series, but is best known as one of Black Library's most prolific Warhammer authors, with over 30 contributions to Warhammer 40,000, Warhammer Fantasy and Warhammer Age of Sigmar, including major Horus Heresy volumes and the Dark Imperium series bridging 40K's old and new eras. Readers coming from the tabletop game's more recent Indomitus-era storyline should start with Dark Imperium; those interested in his standalone science fiction should try Champion of Mars. Haley's dual background as both journalist and novelist gives his prose an unusually brisk, readable quality even across very long, densely plotted series. There is no screen adaptation of his fiction; his reputation is built across the wider science fiction press and the Black Library catalogue.

Series
5
Credited books
15
Published
15
Latest published book
Archmagos 21 November 2025
Active
2011–present
Best known for
The Horus Heresy

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.


Series by Guy Haley


Standalone books

Read these in any order — each is a complete story, listed newest first.

Frequently asked questions

What should I read first by Guy Haley?

Start with the The Horus Heresy series, since it is the first on file. Its first book came out in 2006. Then read it in publication order.

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