Welcome to Cornerstone Middle School where Shiloh and his friends have started middle school. What starts out as an uneventful day quickly spirals into the first of many mysteries and adventures to come. Shiloh, Evan, Max, Desirae, and Roxy team up to solve the mysteries together using their combined smarts and skills with help from Evan's crazy gadgets.In book four, Shiloh and his friends Evan, Roxy, and Desirae want to help spread Christmas cheer...