Jake Johnson has nothing special planned for his summer holidays - until he gets home and discovers his front door ajar.
And from this moment onwards he finds himself caught up in an unexpected adventure!
It turns out that Jake's dad is not just a businessman, but is involved in working for the secret service.
So when they ask Jake to look after a mysterious map, it leads him on an eventful journey across England and Scotland where he meets new friends and foes!
Jake, who is 11, is the main character in this book. He is quick-thinking and curious.
He lives with his mum Sophie and dad Mark, who both become part of the adventure as well.
Jake's grandma also plays quite a big part in the story and it turns out that she has had quite an eventful life when she was young too!
As he travels to Scotland, Jake meets lots of other people on the way - most importantly he befriends Ralph, a loyal German Shepherd dog.
You can never guess what is going to happen next and there's lots of suspense, like when Jake spies two men nosing around his grandma's car in the middle of the night.
Any weak bits?
Not really. It is an impressive first novel written by Al, who is only 11!
Yes - it's a fast-moving, adventurous plot which keeps you turning over every page to find out what happens next!