Alfred Hitchcock and The Three Investigators in "The Mystery of Monster Mountain" by M. V. Carey. Based on characters created by Robert Arthur. Published by Scholastic Book Services, copyright 1973.
"What is the horrible secret hidden in the hills of Monster Mountain"?
172 page paper back book in good condition with no rips, tears, or writing. The cover has some shelf wear to the corners, edges and spine. See the pictures for more detail.