Cam Jansen and her friend Eric are spending the day at the amusement park. They take Cam's aunt and uncle with them through the scary haunted house. Plastic skeletons hang from the ceiling. A large black form jumps out of the shadows of a dark room. Everyone has a wonderful time until they get hungry and thirsty. When Cam's aunt tries to pay for some snacks, she discovers her wallet is no longer in her purse. Will Cam be able to solve the mystery...

A fifth-grader with a photographic memory and her friend Eric help solve the mystery of the stolen diamonds

While visiting Aunt Molly at a fancy downtown hotel, Cam uses her photographic memory to help one of the guests find her stolen luggage and pet cat, and to catch the thief

Cam uses her photographic memory to catch a thief disguised as a ghost

Cam Jansen, with Eric at her side, helps solve the mystery of what happened to Mr. Day's tennis trophy

While at the airport waiting for her father to pick up his best friend from childhood, Cam Jansen uses her photographic memory to help a distressed father find his missing daughter

Using her photographic memory Cam Jansen joins Eric in solving the mystery of a Valentine's day robbery in a hospital waiting room

When a baseball game is stopped because of a lost ball, Cam uses her photographic memory to find the ball.

Cam uses her photographic memory to help a classmate find the tooth she lost at school.

Fifth-grade sleuth Cam Jansen uses her photographic memory to solve a monkey-smuggling mystery at the city zoo