Someone has been stealing and leaving behind little green sneakers, so Bradley, Brian, Nate, and Lucy trail their new teacher, who wears the same shoes in normal size.

Fifth-grade sleuth Cam Jansen uses her photographic memory to catch a thief during a department store sale.

KC and Marshall investigate the theft of a precious emerald, brought by representatives of the Chinese government to bring luck to two baby tigers born at the National Zoo.

The Aldens investigate when an old wooden mask they have found is stolen.

When someone commits robbery and murder aboard the luxurious train on which Myrtle Hardcastle, her Aunt Helena, her governess Miss Judson, and cat Peony are traveling, Myrtle is determined to find the culprit.

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

Birdie Gaux's dog, Bowser, considers himself in charge of security at 19 Gentilly Lane, so when the house is broken into Bowser wants to find the man with the limeade aftershave (and the cat) responsible--but nobody seems to know what the culprits were looking for, or why a strange girl is asking questions about Birdie's father, a policeman who was killed in the line of duty years before Bowser was adopted.

Santa's Workshop Holiday Spectacular at the Colchester mansion is a long standing tradition in Cedarville, however Griffin, Ben, and Antonia are not happy to find that they have been volunteered as elves by their friend Logan and can not get out of it--but this year the pageant seem plagued by frequent electrical outages, and during one of them the valuable antique known as the Star of Prague disappears from the giant Christmas tree, and as they are...

Katie's peanut butter and jelly sandwich is missing, so she must figure out which of her classmates ate it--and what she should do about lunch.

Using her photographic memory Cam Jansen joins Eric in solving the mystery of how some of the school computers were stolen.