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Unification is a 2-book reading order in Warhammer 40,000, spanning Great Crusade. Below is every entry in suggested reading sequence — series order first, then in-universe chronology — so you can follow the story from start to finish and see where each book sits in the wider 40k timeline.
Free reading-order poster
An original, shareable Unification reading-order poster — no Games Workshop art, just the books in order. Pin it, download it, or share the list.
Original summaries and chronology labels generated from the same catalog powering the atlas.
Graham McNeill
A compact pre-Heresy story focused on belief, power, and the ideological roots of the Imperium.
667.M30 - 999.M30
era date, medium confidence
First published 2009
Chris Wraight
A Terra-era character study of Constantin Valdor and the early Imperial power structure before the Legions dominate the timeline.
667.M30 - 999.M30
era date, medium confidence
First published 2020
This reading order matches publication order — release sequence and suggested reading sequence are the same here. Browse every book by release year on the publication-order page.