Help! My Brother's a Zombie

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?