What happened to Professor Perez? Young sleuths will be eager to unravel the mystery in this interactive story packed with logic puzzles. When the Codebreakers Club's beloved professor goes missing, it's time to get to the bottom of this puzzling problem. Chris, Kaira, and Ren soon discover some very intriguing notes written in the professor's distinctive handwriting. The catch? The Codebreakers must solve puzzles he's left behind to...