Perfect for 8-12 year old fans of Murdle Junior, Puzzles for Spies and Cluedle, you choose what path you take, what puzzles you solve, and what answers you take to help you solve a high-stakes mystery.

'Could keep readers guessing all holiday [ . . .] Rip-roaring, brain-teasing stuff' Daily Mail

Solve the puzzle. Stop the baddies. Simple, right?

Step into the shoes of Arlo Banks, and return to a world of secrets, spies and diabolical plans.

It's Christmas, and Arlo is hoping to finally start his top-secret training to become a proper spy.

But old enemies have other plans. When it turns out there's a scheme to rob the Bank of England, Arlo must use all his puzzle-solving cunning to unravel the mystery.

As the temperature drops, and the snow falls, Arlo must delve into the vaults of the world's most guarded building. What he find there isn't gold and jewels, but something far more deadly.

It's a discovery that will take him across the world, and put its future in his hands.

'My son loved this book. It has a really exciting story and the puzzles are so much fun - real brain teasers. So inventive. Would highly recommend. - a 5-star Amazon reviewer.

If you enjoyed this book, check out the others in the Interactive Puzzle Mysteries series:

Death on the Tracks
A Killing at the Box Office
Murder at the Mansion