A series of three expansion books for Warhammer 40,000 third edition. Like the Book of the Astronomican for Rogue Trader, this short-lived annual collected articles from White Dwarf featuring various new rules, updates to the game, and army lists - some official, others merely experimental. There is substantial overlap between the volumes as each subsequent one was in part meant to update and/or collect much of the material of the previous. The original in the series, Chapter Approved, was published in 2001, with Chapter Approved 2003 following in 2002 and Chapter Approved 2004 in 2003 (the year in the title indicating the coming year rather than when it was published). They were also known as the Second, Third, and Fourth Book of the Astronomican, respectively, in homage to the original from Rogue Trader. Army Lists - Feral Orks for use with the Codex: Orks - Gaunt's Ghosts for use with the Codex: Imperial Guard (3rd Edition, 1st Codex) - Armageddon Imperial Guard Regiments for use with the Codex: Imperial Guard (3rd Edition, 1st Codex) - City Fight Imperial Guard for use with the Codex: Imperial Guard (3rd Edition, 1st Codex) - Kroot Mercenaries - Tyranid Seeding SwarmsAdditional Rules - Trial Assault Rules - Minor Psyker Powers - Deathwatch Space Marines - Transport Vehicles - The Emperor's Champion Scenarios - Cityfight Subplots Codex Updates - Reprint updates for Space Marines, Armageddon, Orks, Blood Angels, Catachans, Eldar & Craftworld Eldar - Revisions for Dark Eldar and Dark Angels Playing and Painting - Tactica: Cityfight - 'Eavy Metal Showcase - Tau Colour Schemes - Painting Chaos Space Marines