SpineChillers Mysteries Series: The Phantom of Phys Ed

It was bad enough being the new kid at Crider Middle School. But when Caitlin bumps into the locker of Hezekiah Bones - the kid who disappeared over fifty years ago - she thinks she received his curse. Yet if this "phantom of phys ed" isn't real, then why is she breaking out in a rash, her friend turning invisible, and a mysterious person following her?