We have updated our Privacy Policy Please take a moment to review it. By continuing to use this site, you agree to the terms of our updated Privacy Policy.

Adventure Island: The Mystery of the Invisible Spy

On sale

7th June 2012

Price: £6.99

Select a format

Selected: Paperback / ISBN-13: 9781444005363

Disclosure: If you buy products using the retailer buttons above, we may earn a commission from the retailers you visit.

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!


These are action-packed stories, full of suspense and excitement, and a really good read for 8 to 11 year olds who want a book that will grip them and take them away from our everyday world, but still have a realistic setting.
a fun read - it has a fast paced plot with a good twist, likable characters and a dramatic ending.
Rachie, Guardian Online
This was a very good book suitable for boys and girls. A definite need read!
The plots are involving and intruiging. The mysteries are real and effectively planned, eith red herrings and twists to keep you guessing, while not being confusing for the child audience...I strongly recommend these for 8+ - and that absolutely includes adults. I love these books!