Broken Angels by Richard Morgan (Book 2 Altered Carbon)

Sleeved in a damaged Wedge-issue combat body, Takeshi Kovacs is serving as a mercenary in a brutal little protectorate-sponsored war to put down the rebellion on Sanction IV. 

Taking the chance to join a covert team trying to secure an archaeological prize Takeshi ius dropped into a Maelstrom of treachery and betrayal that makes the front line a happy memory. For this is a prize whose value is limitless and whose dangers an endless. It's a prize that the corporations will kill for. A prize that will take mankind to the brink. 

BROKEN ANGELS rips apart the 26th century to lay bare the violence, the follies and the naked greed that leave man so ill-prepared for the legacy he has been given: the stars.