The worst book you have read

[FoolMoon]

Hm... first comes to mind a short novel i was forced to read two years ago as a school assignment called "montedidio". i don't know, it was just... "leave me alone" kind of book.
it's very sexual in the disturbing way. the main metaphor in the book being a boomerang as the protagonist's... well, "private part". so the sex scenes were a bit traumatic. furthermore, the protagonist and his, lets call it, girlfriend are both barely 14, and there is no cultural excuse in this one and they're so naive that it's just disgusting.