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(0)Gertrude Chandler Warner
Some important papers and a student go missing from the observatory while the Aldens visit a college with their grandfather, they have to investigate both disappearances and see if they are connected.
The Aldens find evidence that the stories about a monster in Lake Lucille might be real.
The Boxcar children decide to help restore a historic firehouse when the town council starts thinking about demolishing it. Soon enough they realize that someone is hindering their efforts.
While on a South Carolina trip the Alden children agree to hunt for a pirate's hidden treasure, but they face a thief who is trying to find it and keep it.
While at the beach Benny discovers a treasure map that alerts unwanted fortune hunters.
The Aldens search for a lost gold mine while on a camping trip to Arizona.
A haunted orchard turns out to be a crime scene when the Aldens discover that valuable antiques have been stolen.
The Alden children are enjoying the train ride until something is stolen from a young woman and they need to find the thief before the last stop.
The children go to stay with their Aunt Jane's friend, Kay, who owns an old motel in Florida. They find that someone is trying to keep it out of business when they decide to help restore it.
The Aldens investigate the incidents happening around their cousin's pineapple plantation in Hawaii.
The Aldens settle easily into farm life when their grandfather sends them to Sunny Oaks for two weeks, but soon they grow suspicious about a peculiar horse in the stables.
A panther provides a clue so the Boxcar children can solve the mystery of a missing ranger at the Everglades National Park in Florida.
Mysterious events are happening in the soccer league the Boxcar children are playing in.
The Aldens discover that someone wants to ruin the Winter Festival when they find a secret message in a set of photos they developed.
The Aldens are asked to be extras in a movie while visiting the Alamo but things are not picture perfect. They have to discover who stole a precious ring from the beautiful star, Claire, and they find out many people are jealous of her.