Allan Ahlberg 
Woof! [EPUB ebook] 

He felt a curious tingling in his hands and feet. He felt his nose becoming cold and wet, his ears becoming flappy. The thought in his mind was: ‚I’m turning into a dog!’Eric is a perfectly ordinary boy. Perfectly ordinary that is, until the night when, in fifteen seconds flat, he turns into a dog! Eric and his best friend are determined to sniff out the truth – what makes an ordinary boy go ‚woof‘?