Buried gold, crystal keys and a book that leads you to the spot where it s buried.
It might sound like the plot of a Hollywood adventure film, but this is a real life quest that s poised to capture the imaginations of would-be treasure hunters everywhere.
The Golden Treasure of the Entente Cordiale, released today in the UK, is part history book, part encrypted treasure map, which promises to lead readers to a £650,000 golden casket if they can solve nine puzzles.
A sister book, written in French, has nine separate clues that also need to be solved.
Each book leads to a piece of crystal - one in the UK, one in France - that together can be used to unlock the final resting place of the golden casket.