All You Need Is Kill

All You Need Is Kill is a Japanese science fiction light novel by Hiroshi Sakurazaka with illustrations by Yoshitoshi Abe. The book was published in Japanese by Shueisha under their Super Dash Bunko imprint in December 2004, and was later released in English by Viz Media under their Haikasoru imprint. All You Need Is Kill follows a soldier named Keiji Kiriya, who, after dying in a battle with extraterrestrials, is caught in a time loop that makes him live the same day repeatedly, allowing Kiriya to improve his fighting skills.