Trapped in the Museum of Unnatural History (The Zack Files #25)
It seems like a regular field trip to a natural history museum€"until Zack gets locked inside for the night and discovers what really goes on in those display cases when no one is watching. A tribe of curious Neanderthals, rampaging woolly mammoths, prehistoric food shortages . . . it€s just another wild adventure for Zack!
