Gertrude Chandler Warner

The Alden children have discovered a ghost in the old boxacar that once was their home.

The Aldens investigate when exotic and endangered animals begin to disappear from the zoo where their new friend Lindsey works.

Boxcar kids have to solve a riddle to find a treasure

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.

Benny wants to get something special for his grandfather's birthday, but he has trouble finding the right present while trying to keep an eye on his dog, Watch.

When the Aldens go to the Pickering Natural History Museum to assist with the opening of a dinosaur exhibit, their work is hampered by a series of mysterious happenings.

When the Alden children and their grandgfather visit Everglades National Park in Florida to slove the mystery of a missing ranger, they discover that a panther provides a clue.

While visiting the Florida Keys, the Aldens encounter suspicious characters, strange incidents at night, and a plot to steal valuable coral.

The Alden children volunteer to take care of a cross old aunt and find that this good deed leads to an exciting discovery and much happiness for all.

The Boxcar children find the key peice to a treasure map and are close to finding it, but so is a ruthless treasure-hunter.