Michael Dahl 
Auto Body Parts [PDF ebook] 

Aboard a strange-looking bus, a girl hears whining coming from a hatch beneath her seat. The whines sound like calls for help. When the girl lifts the hatch to investigate, a hand reaches out and grabs her leg. Then another hand grabs her and another! Are the body parts reaching for help . . . or do they want something more? Step aboard the addictively creepy SCHOOL BUS OF HORRORS, where the final destination is never expected.