While spending two days touring a zoo to see the baby animals, the four Alden children, aged six to fourteen, help catch an escaped monkey, participate in a photography contest, and investigate a missing camera.

Lunch Lady, Betty, and the Breakfast Bunch must figure out who is stealing the goods from the bake sale.

"Dink, Josh, and Ruth Rose solve a mystery at the Museum of Science"--

While staying at Colette's home in Paris, the Thea Sisters plan to attend a runway show at the Eiffel Tower until the designs for the show are stolen.

While the Thea sisters explore Kyoto during a cultural exchange program, a valuable item is stolen from their friend Kumi's family, and the five mice must catch the thief.

After an attempted horse theft goes tragically wrong, sixteen-year-old Caleb Bentley is on the run with his mean-spirited older brother across the American Southwest at the turn of the twentieth century. Caleb's moral compass and inner courage will be tested as they travel the harsh terrain and encounter those who have carved out a life there, for good or ill. Wealthy and bookish Randall Dawson, out of place in this rugged and violent country, is...

The orphan Madeline catches a thief and makes a friend in Rome.

Young Megan Evans learns a lesson about loving one's enemies when her family's nativity set is stolen and she sets out to catch the culprit, assuming that it is Brian, one of her least favorite classmates.