The eighth Zac Power Special Files book, containing two classic Zac stories! In Sudden Drop, Zac uncovers an evil plan to melt the polar ice caps and flood the entire world! Zac has to go into the desert to stop BIG from hijacking a secret water supply. Then, in Tomb of Doom, Zac has to rescue one of GIB’s best agents who has gone missing near the Vanishing Tomb, somewhere in the desert region of the Amber Sands.
