There's a new resident in Castle Key - and somebody is watching him! Scott, Jack, Emily and Drift soon suspect that the new resident is an enemy spy. It explains the bullet-proof glass in the windows of his house. And the MI5 agent who is clearly keeping tabs on him!
But what is an enemy spy doing in Castle Key? Can the friends reveal his true identity? And uncover his top secret mission?
Join Scott, Jack, Emily and Drift as they investigate a man so mysterious he's almost invisible!
Helen Moss was born in 1964 and grew up in Worcestershire and Saudi Arabia. After a degree in psychology and philosophy at Oxford University, Helen went on to do PhD research at Cambridge University. She recently spent a year in Portland, Oregon, with her family, and on returning decided to switch direction and devote herself full-time to writing books for young readers. Helen lives in a small village outside Cambridge with her husband, two teenage sons, two border collies, two gerbils, several hens and a bearded dragon called Frankie. Visit her website at http://www.helenmoss.org.uk and the Adventure Island website at http://www.adventureislandbooks.com.