Title: You have to stop this (Secret series #5)
Description: 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.
Subjects: Mummies, Adventure and adventurers, Magic, Immortality, Fiction, Juvenile fiction, Magie, Immortalism, Unsterblichkeit, Adventure stories, Abenteuer, Sinne, Jugendbuch, Fantasie, Terces Society (Imaginary organization), Children's fiction, Adventure and adventurers, fiction, Mummies, fiction, Magic, fiction