Gertrude Chandler Warner

The Aldens investigate when an old wooden mask they have found is stolen.

People line up around the block to buy Mama Tova's cupcakes. But who could be trying to steal her secret recipe? The Boxcar Children follow clues to a cupcake contest, where they must use their mystery-solving skills to find a thief.

While sightseeing in San Francisco, the Boxcar children uncover a mystery involving fishing boats and sabotage.

The Alden's neighbor, Lina, thinks there's treasure hidden in her attic and she wants the Boxcar Children to help her find it. Of course, the children are eager to help search—but it appears they aren't the only ones looking for the treasure.

When the Alden children accompany their grandfather on a trip to Seattle, they discover clues throughout the city, seemingly planted just for them.

Henry, Jessie, Violet, and Benny Alden, The Boxcar Children, are helping the Greenfield Museum set up an exhibit about ancient Egypt, when all sorts of strange things begin to go wrong! Is the spooky sarcophagus really cursed, or is someone trying to make sure the exhibit isn't successful? The children are sure to find out, whether they're ready or not.

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.

While visiting a Navaho Indian reservation in New Mexico, the Aldens try to save a forest under threat of development by proving it is the site of a lost, buried village, but someone is sabotaging their dig.

When the Aldens agree to watch the house of a local author who has written a book about a vampire, they end up investigating activities that are suspiciously similar to those in his book.

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.