First and Only by Dan Abnett
In the nightmare future of Warhammer 40,000, the galaxy-spanning Imperium is riven with dangers. On the war-torn worlds of the Sabbat system, Imperial Commissar Gaunt must lead the men of the Tanith First against the forces of Chaos whilst negotiating the machinations of rival Imperial Guard regiments . An epic saga of planetary conquest, grand ambition, treachery and honour.