Warhammer: The Horus Heresy - Liber Mechanicum

In addition to the core rules, you’ll need an army list to draw your force from – and that’s where the Liber books come in. Each contains a wealth of game rules and unit profiles to help you construct your perfect army, from wargear options and unique Detachments to points costs and Advanced Reactions. Each major faction has their own book, with the Legiones Astartes split into Loyalist and Traitor halves, as follows:

• Liber Astartes – Loyalist Legiones Astartes Army Book

• Liber Hereticus – Traitor Legiones Astartes Army Book

• Liber Mechanicum – Forces of the Taghmata Army Book

• Liber Auxilia – Solar Auxilia Army Book

• Liber Questoris – Knights and Titans Army Book