No puzzle is too tricky for super-sleuth Cam Jansen and her amazing photographic memory! When Cam, her best friend Eric, and her aunt and uncle visit an exciting amusement park, they expect a day full of thrilling rides and fun games. But trouble strikes right after they brave the spooky Haunted House. Aunt Katie suddenly realizes her wallet is completely gone! Did it simply fall out in the dark, or was it snatched by a sneaky thief? Cam is absolutely convinced that this is the start of a brand new, spooky mystery. With a quick click to lock the clues in her mind, Cam springs into action to track down the missing wallet. Follow along as she races through the busy amusement park, piecing together the evidence. Perfect for young detectives making the leap to chapter books, this thrilling adventure will keep you guessing until the very end!