Heinrich Hoffmann, author of Struwwelpeter, was a German psychiatrist and writer. He originally wrote Struwwelpeter for his son as a Christmas present, but it gained popularity after a friend persuaded him to have it published. It was originally released in 1845, and has been popular ever since.
"“The world’s most terrifying and delicious book.” – Lemony Snicket ""This is the one every household should have."" – The Guardian"