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

While staying at an eighteenth-century inn in Vermont, the Boxcar children become curious about the mysterious "accidents" that keep plaguing the owners. Includes snowy day puzzles and activities.

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.

The Aldens visit Grandfather's friend at the Ogopogo Retreat and aided by puzzling clues, embark on a treasure hunt to prevent the retreat from being sold.

Alice is running for mayor, and someone is using deception to try and beat her, so it's up to the Boxcar children to find out who's behind the dirty tricks.

The Aldens visit the town of Sleepy Hollow, where it seems that the Headless Horseman has returned. Can the Boxcar Children find out what's going on before the ghost tours are ruined?

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

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 Reddimus Society needs the Aldens' help returning lost artifacts. But as the children travel across continents, a rival is hot on their heels.

The Aldens are preparing for a yard sale when they find an old wooden mask in the trash behind a neighbor's house and discover it is an old Native American mask from the Hopi tribe. When the mask is stolen from their garage, the Aldens vow to find it before the weekend Pow-Wow. But with such little evidence, will they be able to find the mask in time? Illustrations.