The Warhammer 40k The Macharian Crusade Omnibus is a trade paperback book written by William King and published by Games Workshop in 2017. This 880-page collection is part of the Macharian Crusade series and offers a thrilling mix of science fiction, action, adventure, and military themes. With a focus on the Militarum faction in the Warhammer 40k universe, this omnibus is a must-have for fans of the genre looking for an immersive and gripping read.