Do you have what it takes to enter the dark and mysterious World of Secrets and free the Hidden from their sinister Keeper?
If so, get a copy of Riddle of the White Sphinx and read to the end of the book to complete the following tasks:
1. Locate the Seven Portals
2. Identify the Hidden
3. Discover their Secrets
4. Crack the Hidden Code
If on your quest, you present your book at each museum you will also receive one of seven unique stamps for your passport at the back of the book. Each one contains part of a riddle to lead you to the Keeper’s Secret, hidden somewhere in Cambridge. Use the Code to unlock the secret and free the Hidden!