An Ear for Danger [Three Investigators: Crimebusters, Bk 5] (Paperback) ISBN-13: 9780394899435 ISBN-10: 0394899431 Genre: Children's Books 1 The Mystery of the Invisible Dog [Alfred Hitchcock and the Three Investigators, Bk 23] (Hardcover) ISBN-13: 9780394931050 ISBN-10: 039493105X Genre: Children's Books ? The Mystery of the Missing Mermaid [Alfred Hitchcock and the Three Investigators, Bk 36] (Paperback) ISBN-13: 9780679830412 ISBN-10: 0679830413 Genre: Children's Books 3 |