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.
During a storm, Meg's brother loses a family heirloom and young detective Meg sets out to find it. The reader is invited to search the pictures for key clues to solve the case.
Meg and her classmates visit a medieval castle and become eyewitnesses to the theft of a priceless silver chalice. The reader is asked to solve the mystery before Meg, using cluesfound in the text and illustrations.
While attending summer camp for the first time, Meg tries to solve the mystery of the camp's legendary ghost. The reader is challenged to interpret each clue before Meg finds the solution.
