Angron's Monolith (Space Marine Battles Novella)

As war engulfs Armageddon, the mysterious and mistrusted Relictors Chapter of Space Marines deploys to the equatorial jungles. As they battle the feral orks who infest that region of the shattered world, they are also scouring the jungle in search of lost battle-brothers, sent to Armageddon in search of an ancient relic with links to the world's mysterious past and to one of the Imperium's arch-traitors, the primarch Angron...