Were is your code book in the 39 clues?

Answer 1

There is nothing called a code book. The 39 clues cards have codes by which you unlock cards. If you mean Agent Card Code then you can get your agent card code in the agent card option in my cards.

My agent card code is P2FHHNDHXP

Answer 2

In the 39 Clues series, the code book is hidden in various locations throughout the series. It is a key part of the Cahill family's quest for power and includes important clues to help unlock the ultimate secret. Each book in the series reveals new clues leading to the code book's location.