When Rosamond's birthday gift for Nate disappears from her sled, the boy detective decides to unravel the mystery.

When 7 is accused of eating 9, worried 6 hires a detective to investigate.

The three Bear Detectives search for a dinosaur bone that is missing from the Bear Museum.

When the Aldens agree to watch the house of a local author who has written a book about a vampire, they end up investigating activities that are suspiciously similar to those in his book.

When the Aldens have the chance to work at a candy factory, they try to find out who is sabotaging the candy and why.

The Alden children uncover a plot to sabotage the Greenfield Bears baseball team. Includes baseball puzzles and activities.

Trying to communicate with his human owner (and detective partner) can be frustrating for King the golden retriever as he uncovers clues in a missing dog case.

When the Boxcar children help out in a local garden, they dig up one strange thing after another! First, the tomato plants seem to move every day. Find out how that can be.

The Aldens realize the food their dog, Watch, is eating in a commercial and enjoying is not the same as what is being sold in stores, and must decide whether they should continue to allow him to work for the dishonest company.

Displaying their best work at school in preparation for Parents' Day, Nancy and her sidekick, Bree, are on the case when a prized possession goes missing, in a first chapter book starring the irrepressible Fancy Nancy.