You have to stop this

When a mummy disappears from the local history museum while Cass and her friends Max-Ernest and Yo-Yoji are there, they try to solve the case in order to clear their names and, they hope, discover the Secret they have been seeking.

Main Author: Bosch, Pseudonymous.
Other Authors: Ford, Gilbert (Illustrator)
Format: Books Print Book
Language: English
Published: New York : Little, Brown, and Co., 2011.
Edition: 1st ed.
Series: Secret series ; #05
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