Cornell Dyer and the Calcium Deficient Bones

When supernatural super sleuth Cornell Dyer finds himself between sleuthing jobs, he fills the time by teaching science while the real teacher is ill. But in a school that’s supposedly getting remodeled, Cornell encounters one mystery after another: vanishing classroom skeletons, plants that come and go, and a piano for every student. Cornell is certain his classroom holds the answer - and that he is one of the clues.