The Secret Series

When intrepid investigators Cass and Max-Ernest set out to discover the history of the mysterious Symphony of Smells, they become embroiled in a dastardly experiment involving kidnapped children and the secret of eternal youth. Together they must come up with a plan to rescue their classmate from a hideous fate and escape the eerie pyramid of the Midnight Sun.

Cass finds herself alone and disoriented, a stranger in a dream-like, medieval world. Where is she? Who is she? With the help of a long-lost relative, she begins to uncover clues and secrets--piecing together her family's history as she fights her way back to the present world. Meanwhile, back home, Cass is at the hospital in a deep coma. Max-Ernest knows she ate Time Travel Chocolate - and he's determined to find a cure. Can our expert hypochondriac diagnose Cass's condition before it's too late?

"In this fifth and final (I swear!) audiobook in my saga of secrets, a class trip to the local natural history museum turns dangerous, or perhaps deadly - and I don't mean in the bored-to-death way - when Cass accidentally breaks a finger off a priceless mummy. Forced to atone for this "crime" of vandalization, Cass and her friends Max-Ernest and Yo-Yoji go to work for the mummy exhibit's curator, only to be blamed when the mummy disappears."