Did Gertrude chandler Warner only write boxcar children?

Gertrude Chandler Warner wrote numerous children's book series beyond the Boxcar Children. Some of her other notable works include:

- The Trixie Belden series: This series follows the adventures of Trixie Belden and her friends as they solve mysteries in their small town.

- The mystery of the old doll series: This series follows the adventures of a group of children who find an old doll and set out to learn its secrets.

- The Mr. Popper series: This series follows the adventures of Mr. Popper, a man who receives a penguin as a gift and must learn how to take care of it.