While helping the Mystery Club to put on a play, Meg must find out who or what is causing things to go wrong. The reader is asked to solve the mystery before Meg, using clues found in the text and illustrations.

Meg investigates the theft of a rare book from a locked library. The reader is challenged to solve the mystery before Meg, using clues in both text and illustrations.

Meg and her friends are playing in the championship soccer match to see who will win the gold medal. However, by half-time, the medal had disappeared. See if you can solve the mystery before Meg, using clues found in the text and illustrations.

In the book that launched her adventures, Meg follows a series of notes hidden in her grandfather's house to solve an old mystery of a missing baseball signed by Babe Ruth. The reader is challenged to interpret each clue before Meg solves it.