Henry, Jessie, Violet and Benny have discovered a mystery close to home, their beloved boxcar home, that is!

Henry, Jessie, Violet, and Benny break into a mystery after cracking open a cookie! When the Aldens go to dinner at a local Chinese restaurant, they find a surprise in Benny's fortune cookie.

Henry, Jessie, Violet, and Benny are watching the clock and waiting to solve a mystery! The children are staying at the home of a famous inventor who was known for her one-of-a-kind clocks. The clocks are not the only things that make noise at midnight, someone, or something is making a mysterious tapping sound.

Violet and Jessie begin an adventure when they journey to Centerville to keep Aunt Jane company on the family farm.

Henry, Jessie, Violet, and Benny are "on the air" and on the trail of a mystery, too! The children are helping out at a local station, where they're performing a play live on the radio, just like in the old days, but sometimes the radio station seems haunted.

While canoeing and backpacking near Timberwolf Lake, the Aldens receive strange warnings to stay away from the area and stumble upon clues to a missing cache of stolen coins.

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.

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

The Alden children suspect that the other guests are somehow involved when things begin to disappear at the bed and breakfast where they are staying in Washington, D.C.

A friendly writer with a metal detector, the mysterious inhabitants of a tower house, and the discovery of a locket in the sand are ingredients for the Aldens' latest mystery.