As billions upon billions of tyranids sweep through the galaxy, consuming every living soul and world in their path, it seems all will soon fall to the ravenous xenos. Faced with foes beyond number, Space Marines and their common enemy the eldar face an impossible dilemma - do they fight to the last honour, or retreat to safety for the future of their race? This omnibus contains the novel Valedor by Guy Haley, alongside four novellas and a host of short stories by some of Black Library best-known authors, including Josh Reynolds, Nick Kyme and L J Goulding.