The Horus Heresy Vol.I - Visions of War is the first of four art books packed with pictures based on the Horus Heresy. With text that reads like a history of the Heresy written by Alan Merrett, the book includes artwork from such artists as Adrian Smith and John Blanche, including some of John Blanche's concept sketches. Visions of War details the Great Crusade, the creation of the Primarchs, and the beginning of the Horus Heresy. Visions of War, along with the other Hours Heresy art books were later included in The Horus Heresy: Collected Visions omnibus, and again in its re-release Visions of Heresy - War, Darkness, Treachery and Death.