All You Need Is Kill (Light Novel)

Mankind is losing the war against the Mimics: mysterious, alien creatures that arrived without warning, leaving a trail of death and destruction in their wake. Hope lies only with the United Defense Force, a military division that holds the front using special powersuits. In Japan, new UDF recruit Keiji Kiriya and his team are set to engage in a special mission to take back Mimic territory, joined by none other than the Full Metal Bitch: a legendary American soldier renowned for her red suit, special battleaxe and high body count. But after being mortally wounded on the battlefield, Keiji gets caught in a time loop that forces him to revisit the battle over and over, retaining his memories each time around. Now, Keiji must live, die, and repeat the same day, becoming a stronger soldier each time, in hopes of someday defeating this alien menace.