Legions Imperialis list building receives a comprehensive update in Liber Strategia, a 240-page volume that compiles and revises material from the core rulebooks, The Great Slaughter, The Devastation of Tallarn, and The Rise of the Dark Mechanicum.

This volume provides fully updated Detachments and Formations for Legiones Astartes, Solar Auxilia, Mechanicum Taghmata, Dark Mechanicum, Collegia Titanica, and Knight Households—the latter superseding the Strategic Asset rules from the Legions Imperialis rulebook—making it an essential reference for all Legions Imperialis players. It also includes Detachments for the latest Legiones Astartes units featured in this edition.