The Message in the Hollow Oak

Author: Carolyn Keene

Summary: Nancy's aunt Eloise calls her because she has a friend who is a professional detective. Upon hearing of Nancy, he asks for her help in solving a mystery he and his colleagues couldn't finish.

Recommendation: Yes! This book has loads of mystery and suspense. Nancy gains enemies who try to harm her, but as always, she is able to come out the winner.

Hearts: 3