Gertrude Chandler Warner

When the Alden family climbs to the top of Old Flat Top Mountain, they encounter a mysterious mountain cave, a perilous rockslide, and a secret treasure.

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

"On a farm, the Aldens find their oldest mystery yet! Adapted from Gertrude Chandler Warner's story of the same name, this early reader allows children to start reading with a Boxcar Children classic."--

"People say nothing interesting happens in the village of Port Elizabeth but, on a visit there, the Boxcar Children find a big mystery at the schoolhouse. Adapted from Gertrude Chandler Warner's story of the same name, this early reader allows children to start reading by themselves with a Boxcar Children classic."--Amazon.

"The Boxcar Children are helping at a pizzeria, but it seems that someone is trying to shut it down. Can they find out who is causing trouble? Adapted from Gertrude Chandler Warner's story of the same name, this early reader allows children to start reading by themselves with a Boxcar Children classic."--Amazon.

The Aldens follow a clue to Beijing, China, where they uncover their next mission, to return a mysterious clay artifact to its rightful owner. Their journey leads them to a scenic section of the Great Wall, but a thief threatens to ruin their trip and endanger their precious cargo. The Aldens' next clue brings them to an elephant reserve in Thailand, but when their contact acts suspiciously, they worry someone close to them may be working for the...