The Guns of Tanith

In the Sabbat Worlds Crusade, the heretical forces of Chaos are fighting back hard. Dangerously overstretched, their supply lines cut by degenerate enemy troops, the Imperial forces grind to a halt.Colonel-Commissar Gaunt and the Tanith First-and-Only must recapture Phantine, a world rich in promethium but so ruined by pollution that the only way to attack is via a dangerous - and untried - aerial assault. Pitted against deadly opposition and a lethal environment, how can Gaunt and his men possibly survive?