As President of the Shoreham Detective Club, Pete Hollister called the meeting to order: "You have all heard about the Shoreham monster. We're going to solve this mystery. But besides the monster, we have another project-the new toy library at the school. Pam will tell us about it." His sister, Pam Hollister, rose: "It's a new kind of library-instead of borrowing books, children who can't afford toys can borrow them. I think the Shoreham Detective Club should help find toys for the library . . ." Suddenly, the meeting was interrupted by a terrified scream. Holly Hollister stood pale and trembling, pointing to the window. "I saw it! I saw the monster! It was wrinkled-like an old man-with big teeth!" And that is just the start of this newest adventure of the Happy Hollisters! Before long, the Hollisters-and the other members of the Shoreham Detective Club-find themselves deep into a mystery that not only involves the "monster," but flying saucers . . . a mysterious airplane with an even more mysterious pilot . . . and the strangest case of kidnapping you've ever heard of!