Trixie Belden Mystery Quiz Book No 1 - Trixie Belden Author:Jack Wacker (Illustrator), Kathryn Kenny, Erv Gnat (Illustrator) Activity book. There are over 50 Questions to test what you really know about Trixie. Do you really know her? Includes cartoon mysteries, minute mysteries, quizzes, plus bonus Trixie Belden Short Story.