The Mystery of the Missing Everything — Ben H. Winters

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 canceled everything fun until the trophy is back, including the eighth graders' long-awaited, once-in-a-lifetime field trip to Taproot Valley. Rock climbing, ropes courses, ecology hikes, s'mores . . . all gone!

Luckily, Bethesda Fielding is on the case. As self-appointed sleuth extraordinaire, Bethesda's confident she'll be able to track down the culprit in no time and save her class trip! Except it seems like the more she searches for answers, the more mysteries she reveals. . . . Can Bethesda solve this baffling mystery -- or are the eighth graders doomed for a Week of a Thousand Quizzes instead?