They start chasing a mystery--then it chases them. Twelve-year-old cousins Sophie and Jessica are solving mysteries in small town Pine Hill. Each book is filled with fun, excitement . . . and a dash of danger. Join them and their friend Tony as they solve mysteries in The Feather Chase, The Treasure Key, andThe Chocolate Spy. If you (or the eight- to twelve-year-olds in your life) like Nancy Drew, Theodore Boone, or the Hardy...