Ernie wants to be Jeff's best friend, so he promises to let Jeff in on his top secret project. Then Ernie is in a fatal accident. But he's not gone for good--his ghost is trying to tell Jeff something, and it involves the terrible nature of the top secret project.

Ghost of Ernie P. 1992, Scholastic, New York, NY

ISBN-13: 9780590450737

Trade paperback

The Ghost of Ernie P. 1990, Holiday House, New York, NY

ISBN-13: 9780823408351