Help! My Brother's a Zombie (Nightmare Club)

The Nightmare Club is not for just ANYBODY. Only the spookiest, scariest stories get told at Annie's Halloween sleepovers--and if you can't take it, well, tough! Jack's older brother Stephen has always been a great friend...until he started to change. First it was his smell. Then his face. Then his diet. Stephen's just going through the usual changes that come with being a teenager... Or is he?