Boxcar children mysteries

When the Aldens visit a university campus, they must solve a mystery involving an old library whose stone gargoyles seem to move on their own.

While visiting a friend in New York City, the Aldens investigate the theft of a valuable diamond.

When their favorite author fails to arrive as scheduled to speak at the local library, the Alden children investigate how he could board a train and never be seen again.

The Aldens investigate when exotic and endangered animals begin to disappear from the zoo where their new friend Lindsey works.

Contains three mystery novels featuring the Boxcar children; including "The Mystery at the Ballpark," "The Mystery of the Hidden Beach," and "The Summer Camp Mystery.".

Contains three stories in which the Boxcar children go on a Caribbean cruise, visit Hawaii, and work at a mall.

While on a camping trip with their grandfather, the Alden children try to find out about the loud music and missing food that threatens to scare away other campers.

The Aldens try to help a visiting Russian gymnast who is surrounded by mysterious people and events and who seems to have a secret.

A collection of three mysteries in which the Boxcar Children face snow, ice, and cold as they set out on their latest adventures, including finding out who is trying to ruin the fun at a winter carnival, discovering a secret in the snowy wilderness, and solving puzzles at an old-fashioned New England inn.