Your cart


Total AUD



  • Orion Childrens
  • Orion Childrens

Adventure Island: The Mystery of the Invisible Spy: Book 10

Helen Moss, Leo Hartas

4 Reviews

Rated 0

Fiction, Adventure stories (Children's / Teenage)

Jack, Scott, Emily and Drift the dog investigate the mysterious case of a spy in hiding in the tenth Adventure Island mystery.

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!

Read More Read Less

Praise for Adventure Island: The Mystery of the Invisible Spy: Book 10

  • 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. - PARENTS IN TOUCH

  • 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! - THOUGHTS FROM THE HEARTHFIRE

  • a fun read - it has a fast paced plot with a good twist, likable characters and a dramatic ending. - BOOKAPOET

  • This was a very good book suitable for boys and girls. A definite need read! - Guardian Online - Rachie

Read More Read Less

Helen Moss

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 and the Adventure Island website at

This website uses cookies. Using this website means you are okay with this but you can find out more and learn how to manage your cookie choices here.Close cookie policy overlay