Step right up to the greatest and most puzzling show on earth! Cam Jansen and her best friend Eric are thrilled to spend the day under the big top at the circus. They cannot wait to see the acrobats, the animals, and the hilarious clowns. But the fun takes a sudden turn when a sneaky pickpocket starts stealing from the people in the crowd! With so many costumes and distractions, the thief thinks they can easily get away with the crime. They did not count on Cam Jansen being in the audience! With a quick click of her mind, Cam locks the chaotic circus scenes into her amazing photographic memory. Now, she must sift through the colorful clues to track down the culprit hiding among the performers. Perfect for young readers making the leap to chapter books, this thrilling mystery proves that Cam's brain is the best act in town!