I am reading My Hairiest Adventurers written by rlstine.com. My book relates to the really world because he is having a hared time at school when he finds out he has grown hair on his hands.He finds outta that it is his tern to do a book report in front of the entire class that he has hair all over his hand .So what he did was go out of class and get gloves from his locker.when he came back to class know one know test the nasty black hair on his hands.
What is weird about this story is that strange things happen to him as he grows up. When he was little the doctors found out that he can't sweat.So if he gets over heated it could really hurt him.As he got older he notes dogs had started chasing him  for know resin.Few weeks after the dog intended he grow hair on his hand and ever time he shaves it of even more grows back. I have not read the whole book yet but it seems like he mite be a wolf.