Mickey7 by Edward Ashton

Dying isn't any fun...but at least it's a living. Mickey7 is an a disposable employee on a human expedition sent to colonize the ice world Niflheim. Whenever there's a mission that's too dangerous-even suicidal- the crew turns to Mickey. After one iteration dies, a new body is regenerated with most of his memories intact. Mickey signed on to escape from both bad debts and boredom on Midgard. After six deaths, Mickey7 understands the terms of his deal...and why it was the only colonial position unfilled when he took it. When he goes missing and is presumed dead at the hands of deadly indigenous creatures, Mickey8 reports for duty, and their troubles really begin.