A unique fictional series which you can just read for enjoyment, or if you are a puzzle lover, or code-breaker, then you can also try and solve the puzzles in the book in order to discover where the Prize has actually been hidden. The story is fiction, but the places are real. Use the book, and the internet, to try and solve the puzzle.
Check out the additional clues within this website (they supplement the clues within the books), and even read a chapter or two on line, but take care to read the books in the right order, else you may spoil your enjoyment....