Passcode

When a reclusive bestselling mystery writer dies, he leaves behind one final puzzle. His fortune – more than £100 million in gold – has been locked inside a safe, and the six-digit passcode is hidden somewhere in this book.

Unfortunately, so are 27,999 false codes.

Armed with a series of ingenious rules, readers must work their way through the book, eliminating false passcodes and narrowing down the possibilities until just one remains. Along the way, there are red herrings, hidden patterns and Easter eggs to discover – but only careful observation, logic and persistence will lead to the answer.

No advanced maths is required. Just a sharp eye, a logical mind and the determination to solve a mystery designed to keep you guessing until the very last number.

Can you crack the passcode?