When Peter Stone answers an advert promising to release the hidden power of the mind, he doesn't expect to find anything as squalid as the entrance to Dr Black's office. And the mysterious doctor isn't quite what he seems either. But Peter is so determined to change his life that he ignores the warning signs...and then it's too late. Powerless to escape an experiment that goes horribly wrong, Peter finds himself in a life-or-death struggle with an invader in his mind. The Boy Who Haunted Himself is a truly creepy thriller with a difference, from the author of the spectacularly successful Horrible Histories.