The seventh Zac Power Special Files book, containing two classic Zac stories! In Poison Island, Zac must track down Dr Drastic, an enemy scientist. Zac has 24 hours - and his family’s life depends on him succeeding! Then in Volcanic Panic, he discovers his enemy’s secret base - and gets trapped there! Zac knows that something isn’t quite right, and soon he discovers a secret that GIB has been trying to uncover for years...