Addison Cooke and the ring of destiny

Budding archeologist Addison Cooke receives a mysterious package that draws the attention of criminals and fortune-hunters from all over the world. Along with his sister, Molly, and friends Raj and Eddie, he flees through cities such as London, Paris, and Istanbul to discover the truth behind the package and learn what really happened to Aunt Delia and Uncle Nigel. But what they find reveals that their aunt and uncle had dangerous secrets.