His Dark Materials: #2
Will is twelve years old and he's just killed a man. Now he's on his own, on the run, determined to discover the truth about his father's disappearance.
Then Will steps through a window in the air into another world and finds himself with a companion - a strange, savage girl called Lyra. Like Will, she has a mission that she intends to carry out at all costs. But the world of Cittagazze is a strange and unsettling place.
Deadly, soul-eating Spectres stalk its streets, while high above, the wingbeats of distant angels sound against the sky. And in the mysterious Torre degli Angeli lurks Cittagazze's most important secret - an object which people from many worlds would kill to possess.