When Zak Darke's parents die in an unexplained mass murder he's left alone in the world. That is until he's sought out by a mysterious man: 'I work for a government agency', the man tells him. 'You don't need to know which one. Not yet. All you need to know is that we've had our eye on you. There's a possibility you could help us in certain ...operational situations'. Zak becomes Agent 21. What happened to the 20 agents before him he'll never know. What he does know is that his life is about to change for ever...
- ISBN10 0385617496
- ISBN13 9780385617499
- Publish Date 1 January 2099 (first published 6 January 2011)
- Publish Status Cancelled
- Out of Print 24 May 2010
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Doubleday Children's Books
- Format Hardcover
- Pages 320
- Language English