Zac Power is a boy spy who has 24 hours to save the world . . . and do his homework! A haunted house, sabotage in space, vanishing tombs, and undead dinosaurs--Zac's biggest ever adventures are action-packed! But can he outsmart an evil genius and save the world . . . yet again? Zac's Biggest Ever Hits: Volume Three is a super-set containing: Tomb of Doom, Lunar Strike, Fossil Fury, and Horror House.