"I'm at that special age: 12. It is one of my favourite numbers in the whole universe. In fact, it's my perfect number. 12 isn't just the sum of 10 (the base of our whole amazing number system) and 2 (the only even prime number in the cosmos) but it's the first number with 1, 2, 3 and 4 as
factors. I reckon that's so cool."
Eliot thinks outside the box. He can't help it. Numbers are his thing – and letters, too. So when the biggest mystery that struck his school in the history of the world needs to be solved, Eliot is the one to call on. Can you solve the mystery and find out who did it – before Eliot does? This time the solution isn't in the real world (the ‘real' world of the story). Instead it's inside the book itself
– locked away in a series of puzzles. Can you find the clues, solve the puzzles and find the
culprit?
外文書商品之書封，為出版社提供之樣本。實際出貨商品，以出版社所提供之現有版本為主。部份書籍，因出版社供應狀況特殊，匯率將依實際狀況做調整。
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