As soon as I saw this cover it had me interested. I find myself thinking back to Enid blyton books from early days.the book started well with Bletchley park being the focus. It entices fun and adventure and so the adventure begins. I like the plots the exciting way the story teller explains what is happening and of course the way the plot begins to flow. I was expecting it to be a teenagers book but was delighted when I started to follow the adventures. The way the friends stick together and the old friendly comarderie shines through. A true who dunnit with a twist it takes me back again to reading as a child and the way I would read at night and the expectation of a happy ending. Try this book it’s good it’s adventurous and I think it harks back to a time of plots nice food and lots of lemonade. A feel good book with fun characters and a adventurous plot!