Case Of The Mausoleum Mummy During a rare autumn heat wave, Theo and his friends stumble upon a mysterious mummy hidden inside a coffin in the basement of an old, abandoned mausoleum at Lakeside cemetery that is just days away from being demolished. Now, their upcoming long weekend promises to be full of exciting exploration, strange secrets, and daring investigations. When one of Theo's teachers asks him to help solve a family mystery related to the old mausoleum, Theo gladly takes the case, not knowing the danger ahead for him and his friends. With another mummy discovered at a local museum, Theo realizes something is definitely amiss in Lakeside. What's up with all the mummies? Then, the discovery of a smuggling ring threatening their small town, plunges Theo and his friends into more danger, and now they must race against time to unravel the truth before the past is buried forever. Can Theo solve the case of the mysterious mausoleum mummy, and keep himself and his friends out of trouble, or will the secrets of Lakeside Cemetery claim another victim?