A Disappearance in Magicland — Penny Warner

Cody, Quinn, Luke, M.E., and Mika are the Code Busters—clever clue hunters with a passion for puzzles. They're excited for a fun-filled day at the Houdini-inspired Magicland theme park. The club plans to decipher the park's hidden codes to win a big prize. But when Cody's mom gets sick and her younger sister disappears in the park, the whole plan changes. As they search Magicland, the Code Busters notice a mysterious person in a mask keeps following them. Will the Code Busters be able to find Cody's sister and get away from the masked person? And can they manage to win the prize along the way? Can you crack the code? Test your brain with the Code Busters to see if you have the right stuff to be an ace detective. Answers are in the back, if you ever get stuck.