Secrets at Hidden Valley - Roberts, Willo Davis, and Davis

With her father dead and her mother off on a movie shoot, Steffi has no where to go, except to her grandfather's remote RV camp in northern Michigan. He's grumpy and secretive. Everyone seems to be hiding something, Steffi soon discovers.

Secrets at Hidden Valley 2012, Aladdin Paperbacks

ISBN-13: 9780689811678

Aladdin Paperbacks edition

Trade paperback

Secrets at Hidden Valley 1997, Atheneum Books

ISBN-13: 9780689811661