"Nancy, George, and Bess are attending a three-day overnight camp at the local zoo. They'll get to spend lots of time with all of the animals and learn about them, too. The best part is, they will be helping the zookeeper make toys for the animals, just like real staffers! But when the toys the girls make by day are disappearing at night, it looks like everyone is a suspect! Can Nancy tame this wild case, or will the zoo animals be without anything...

Henry, Jessie, Violet, and Benny are spending a week on a houseboat! Throughout the journey, the children have the feeling they are being watched--and they are. Someone wants something that's hidden on their boat, and they'll stop at nothing to get it.

A family, snowbound in a vacation cabin, discovers adventure in surrounding wild life, three children they find in the snow, and a search for a lost recipe.

Jigsaw is upset because his dog, Rags, is missing so Jigsaw and Mila set out to find him.

"The Alden children are helping their new neighbors build a tree house when they discover an attic window that not even their neighbors knew about"--Title verso page.

When the Claymore Diamond is stolen from Ravensburg's finest jewelry store, Stanley Carusoe gets the bright idea that he and his friends should start a detective agency. Armed with curiosity and their love for math, Stanley, Charlotte, Gertie and Felix race around town in an attempt to solve the mystery. Along the way, they butt heads with an ambitious police chief, uncover dark secrets, and drink lots of milkshakes at Mabel's Diner. But when their...