The Aldens try to solve a series of mysteries which took place in a old hotel in Kansas which they visit.

The Boxcar Children are helping a friend find out more about their family's history. But what they find is a mystery going back generations! Can the Aldens help their friend unlock secrets of the past--and present?

While visiting their cousin's pineapple plantation in Hawaii, the Aldens hear a local legend about a black pearl with a curse on it and investigate mysterious incidents on and around the plantation.

When the Aldens visit Yellowstone they discover a map showing the way to an old cabin where gold is supposedly hidden, but they encounter lots of interference in their attempts to hike the trail.

"One day in the park, the Aldens' dog, Watch, comes across a mysterious box with a note inside. 'Congratulations!' the note says. 'You've found it!' The box is part of a game called Geocaching. Soon, Henry, Jessie, Violet, and Benny are searching all over town for hidden boxes and making friends with other kids in the geocaching club. But is one of the club members a thief?"--Page 4 of cover.

Growing up in an orphanage, Leila was bullied for being different. She turned her hardship into skill by becoming an escape artist--a valuable trait when belonging to a group of magical best friends. But when a famous psychic comes to town, Leila and her pals won't be able to escape the big mystery heading their way. Whether chasing mad monkeys or banishing ghosts from haunted hotels, these six friends will do their best to keep Mineral Wells safe--but...