Dark blue cloth with gold lettering on spine, in an unclipped dust jacket. First printing of the reinforced hardcover edition. This book is from a private collection, and is NOT a library discard. The book is square and tight, with minor wear to extremities. The pages are mildly age-toned, but clean and unmarked. The dust jacket has light edge wear, light wear at the corners and spine ends, and a one-quarter inch tear at the bottom of the front flap edge. The monster who terrorizes Bayport and a girl who runs away to join a cult are the subjects of the Hardy boys' sleuthing. Cover illustration by George Gaadt. 184 pp.

Children's Mystery Hardy Boys Cults Monsters Franklin Dixon Leslie Morrill George Gaadt Collectible