Acenet is recruiting. Can you pass the test? If you think what it takes to join the elite members of Acenet, here's your challenge.

• Find a secret coded message by searching Molly Root's pictures of the day she followed Detective Drake through Chinatown.

• When you have found the message, crack the code to find a password.

• Once you have deciphered the code, email the password to Molly's email address.

• If you are successful, we will reward the first five people to email the correct answer, some free Random House books. Check out the terms and conditions for more details.

• As this is your first challenge we will give you a few pointers if you get stuck. Check out the Guardian Teen Books Facebook page between 14 November and 18 November for hints.

Good luck!