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New to Mechanicum? These are the most approachable entry points among its 3 books — start near the top and branch out. Below this, every Mechanicum book is listed in full.
Original summaries and chronology labels generated from the same catalog powering the atlas.
Graham McNeill
A Mars-centered Heresy novel about the Mechanicum's internal fracture and the strategic cost of rebellion spreading off the battlefield.
005.M31 - 005.M31
exact date, high confidence
First published 2008
Aaron Dembski-Bowden
A Terra-centered novel about the hidden war beneath the palace and the cost of the Emperor's plans.
004.M31 - 014.M31
range date, medium confidence
First published 2016
Graham McNeill
Part of the Siege of Terra sequence, this novella follows a desperate mission to the moon to secure the gene-cult of the Selenar, whose secrets the loyalists hope can replenish their dwindling forces. A team of disparate warriors must navigate the lunar enclave's defenses while a returning figure pursues his own dark designs.
334.M31 - 666.M31
era date, medium confidence
First published 2020