First & Only — Dan Abnett

"The Tanith are strong fighters, general, so I have heard.' The scar tissue of his cheek pinched and twitched slightly, as often did when he was tense. 'Gaunt is said to be a resourceful leader."
"You know him?" The general looked up, questioningly. "I know of him sir. In the main by reputation."

Gaunt got to his feet, wet with blood and Chaos pus. His Ghosts were moving up the ramp to secure the position. Above them, at the top of the elevator shaft, were over a million Shriven, secure in their bunker batteries. Gaunt's expeditionary force was inside, right at the heart of the enemy stronghold. Commissar Ibram Gaunt smiled.

IN THE NIGHTMARE future of Warhammer 40,000, mankind teeters on the brink of extinction. The galaxy-spanning Imperium is riven with dangers, and in the Chaos infested Sabbat system, Imperial Commissar Gaunt must lead his men through as much in-fighting amongst rival regiments as against the forces of Chaos. First and Only is an epic saga of planetary conquest, grand ambition, treachery and honour.