When the children uncover a strange puzzle in a friend's back yard, it's the start of a "spy game" leading to gold. But first they must make sense of an old photo and a riddle, and learn just who is behind this mystery within a mystery.

When the Boxcar children help out in a local garden, they dig up one strange thing after another! First, the tomato plants seem to move every day. Find out how that can be.

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 fun new treasure-hunting game.

Jessie and Henry's robotics team is competing in a big tournament. But when their robot is stolen, the Aldens have a high-tech mystery to decode!

The Boxcar Children know how much work it takes to live in the wilderness. They also know how much fun it can be! The children love exploring and learning new things at a primitive skills summer camp. But when strange things start happening around the camp, they need to use another of their favorite skills—mystery solving! The Boxcar Children know how much work it takes to live in the wilderness. They also know how much fun it can be! The children...

The Alden family rents a houseboat to drift down the river, and encounters a mystery in the little towns along the river involving a fast black car.

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.

What will the Aldens discover on a vacation to a deserted island? Adapted from Gertrude Chandler Warner's story of the same name, this early reader allows children to start reading with a Boxcar Children classic.

When the Aldens arrive at Camp Seagull, everything goes wrong. They investigate to see if someone is cheating in order to win the annual camp Olympics.

"Henry, Jessie, Violet, and Benny Alden are orphans looking for a place to live together as a family. Could a boxcar in the woods be their new home?"--|cProvided by publisher.