A Tale of a Girl Who Kills the World – Nishioka Kyodai
A Tale of a Girl Who Kills the World by Nishioka Bro-sis (Nishioka Kyoudai), a brother-and-sister manga team who debuted in 1989 / this 2002 Japanese-language picture book — in case it’s not obvious — is for adults / 36-page hardback with jacket, in overall Very Good condition (light shelf and age wear)
Seems like an ultimate WTF book — yes, it’s about a little girl who kills her parents.