When a calico cat shows up at Grandfather's house, the Boxcar Children try to find its owner, but are unsuccessful. Not sure what to do, they take it to the animal shelter, but learn that the anonymous founder is shutting it down. The children turn their boxcar into a temporary shelter until they can find the missing founder.

It's summertime, and Henry and Benny are excited about their new jobs in the local department store. When a valuable vase disappears, the manager suspects the boys of causing trouble. They're innocent, but who is responsible for all the suspicious things going on? It's up to Benny to uncover the mystery. . . .

The paperback editions of The Boxcar Children Mysteries: #1, The Boxcar Children; #2, Surprise Island; #3, The Yellow House Mystery; and #4, Mystery Ranch are offered together in a cardboard case.

The paperback editions of The Boxcar Children Mysteries: #5, Mike's Mystery; #6, Blue Bay Mystery; #7, The Woodshed Mystery; and #8, The Lighthouse Mystery are offered together in a cardboard case.

Henry, Jessie, Violet and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are spending the summer traveling on a train--in their own caboose, Number 777. On the trip, they encounter a strange mystery surrounding the history of their caboose!

Henry, Jessie, Violet and Benny used to live alone in a boxcar. Now they live with their grandfather, and he is taking them on a camping trip. But some strange things begin to happen--mysterious music, disappearing lanterns, and frightening notes--and soon the Boxcar Children have another mystery to solve.

Grandfather's new land in the Rockies comes complete with an abandoned town, an old silver mine, and a ghost!

Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now, they have a home with their grandfather and are spending the summer in a lighthouse. But strange things begin to happen around the lighthouse, and soon the Boxcar Children embark on another delightful adventure.

When the Boxcar Children find an old journal behind the closet wall in the guest room, they never dream it will lead them on a search for a valuable coin collection. What happened to the girl who wrote the journal . . . and what is she trying to tell them?

The Boxcar Children are spending the summer in a mobile home on the beach. One morning Benny finds a valuable gold locket in the sand and decides to try to find its owner. Soon, the kids are caught up in a puzzle that involves shadowy figures on the beach and the mysterious Miss Smith, who seems to be alone in the big Tower House nearby.