The finale to the New York Times bestselling Secret Series! I always feared this day would come. A secret is meant to stay secret, after all. And now we've come to this: the fifth and final (I swear!) book in my saga of secrets. A class trip to the local natural history museum turns dangerous when Cass accidentally breaks a finger off a priceless mummy. This crime of vandalism leads her and her friends Max-Earnest and Yo-Yoji on an expedition into a land of majestic pyramids, dusty tombs, and the walking dead. Is it Egypt? Or somewhere much stranger...