Zac Power is a boy spy who has 24 hours to save the world ... and do his homework! Evil rockstars, robotic crocodiles, erupting volcanos and parachute pants - Zac's biggest adventures are action-packed! Can Zac survive BIG's dirty tricks and save the world ... again? Zac's Even Bigger Hits: Volume 2 is a super-set containing: Volcanic Panic Sky High  Shock Music Swamp Race Zac Power is a publishing phenomenon that has taken the reluctant reader market by storm, selling over 3 million books in Australasia alone since launch.