My book review of the Japanese light novel All You Need Is Kill by Hiroshi Sakurazaka.
This light novel was the basis for the Tom Cruise film, Edge of Tomorrow.
From the Back Cover:
When the alien Mimics invade, Keiji Kiriya is just one of many recruits shoved into a suit of battle armor called a Jacket and sent out to kill. Keiji dies on the battlefield, only to be reborn each morning to fight and die again and again. On his 158th iteration, he gets a message from a mysterious ally–the female soldier known as the Full Metal Bitch. Is she the key to Keiji’s escape or his final death?