The Story of the Little Mole who knew it was none of his business

The Story of the Little Mole Who Knew It Was None of His Business or The Story of the Little Mole Who Went in Search of Whodunit (German, "Vom kleinen Maulwurf, der wissen wollte, wer ihm auf den Kopf gemacht hat", literally "About the little mole, that wanted to know, who 'did' [poo-poo] on his head") is a children's book by German children's authors Werner Holzwarth and Wolf Erlbruch. The book was first published by Peter Hammer Verlag in 1989; it was soon translated and became an international success.