Two brothers take summer jobs at a department store where a series of peculiar events brings them under suspicion.

The Boxcar Children go on vacation with Aunt Jane to visit her friend, Kay, who owns an old, shabby motel.

The Aldens head back to the Mystery Ranch for another summer! They are thrilled to learn their friend Mike has moved to Yellow Sands-a new town nearby. But when a house fire breaks out and Mike is blamed for starting it, the Aldens must find the real culprit to help their friend.

At an old library, the Alden children discover a boy who needs their help and a stranger who is after a valuable object they found in the library.

The Aldens become involved in a community theater production of "The Wizard of Oz," which is systematically and mysteriously being sabotaged.

When the Alden children accompany their grandfather to the Snow Haven Lodge, a series of odd occurrences threaten to disrupt the annual winter games.

When the Aldens go the the Pickering Natural History Museum to assist with the opening of a dinosaur exhibit, their work is hampered by a series of mysterious happenings.

The Aldens search for carousel horses that have disappeared from an amusement park.

The Alden children help out a storeowner at the Hope Harbor Mall and discover that someone is tampering with the merchandise shipments.

When their grandfather arranges for them to spend two week at Sunny Oaks, the four Alden children enjoy settling into the routines of farm life but become suspicious about a mysterious horse locked in the stables.