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.

On a whale watch, Meg tries to solve a puzzling case involving a stolen treasure map. The reader is asked to solve the mystery before Meg, using clues found in the text and illustrations.

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 clues found 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.

Meg investigates the theft of a rare book from a locked library. Clues hidden in different places in the library challenge the reader to solve the mystery before Meg.

A gold medal is missing at the soccer match and Meg Mackintosh is on the case. Her fellow teammates, the coach's son, and even the parents are suspects. The reader may search the pictures for key clues.

A big holiday storm is looming and a baffling mystery is building. Meg's brother has lost a priceless family heirloom somewhere along Main Street. The reader is invited to search the illustrations and the text for clues to solve the case along with Meg.

In this eighth adventure in the popular Meg Mackintosh Mystery series for young readers, children join Meg at school, where the mystery club is performing a play. During the twists and turns of the play, a real mystery takes place on the stage. Young detective Meg, who is the announcer for the play, must use her powers of observation and deduction to solve such questions.

Designed to both entertain and teach valuable lessons from United States history, this book follows two young detectives as they solve mysteries from the nation's past. Ninth in a popular series, this book features more maps, photos, and puzzles to be examined as Meg and Peter race across the countryfrom Plymouth, Massachusetts to San Francisco, California to figure out the mysteries.

In the 10th mystery in this series, Meg Mackintosh spends an afternoon at Red Herring Beach with her grandfather. After going for a swim, and after several suspicious characters come in and out of the beach area, Megs grandfather realizes that his gold watch has gone missing. Meg tackles this mystery with her cousin Maxwell as they search for clues and are led off the trail.

In the 11th title in this mystery series, Meg Mackintosh receives a puzzling letter on her birthday, which happens to be on April Fools' Day. She sets off following a trail of puzzles and clues which lead her to a curious old house...and the sender of the letter? Is this a real birthday present or an April Fools' Day prank? Meg uses her sharp detective skills to solve the mysteries.