warhammer black library siege of terra the shattered and the soulless paperbackA Siege of Terra Omnibus This collection combines two novellas into one volume, exploring different aspects of the Siege of Terra one from the gene manipulation labs that ultimately produced the Space Marines, and another about Magnus and his fall to Chaos. READ IT BECAUSE These two tales shed light on the Horus Heresy, adding important context to both the creation of the Space Marines and the plight of Magnus, a tragic figure if ever there was one.