There has been a shocking crime at Mary Todd Lincoln Middle School. In a glass case in the front hall, a trophy--the trophy, the first trophy ever won in the school's lackluster competitive history--has been stolen. Even more horrifying, an outraged Principal Van Vreeland has threatened to cancel the eighth graders' long-awaited, once-in-a-lifetime field trip to Taproot Valley unless the trophy is returned. Self-appointed sleuth...