No mystery is too wild for super-sleuth Cam Jansen! When Cam and her friend Eric visit the local zoo, they expect a fun day of looking at their favorite animals. But trouble strikes when a few playful monkeys suddenly vanish from their cage. The police are stumped, but Cam is already on the case. Thanks to her amazing photographic memory, she remembers exactly what the monkey house looked like before the theft. With a quick "click" of her mind, Cam spots the clues that everyone else missed. Can she track down the clever thief and rescue the missing monkeys before they are gone forever? This fast-paced, engaging chapter book is perfect for newly independent readers who love solving puzzles, outsmarting the bad guys, and following a spunky heroine on a thrilling adventure.