The Subtle Knife

Lyra finds herself in a shimmering, haunted underworld—Cittàgazze, where soul-eating Specters stalk the streets and wingbeats of distant angels sound against the sky. But she is not without allies: 12-year-old Will Parry, fleeing for his life after taking another’s, has also stumbled into this strange new realm.
On a perilous journey from world to world, Lyra and Will discover an object of devastating power. And with every step, they move closer to an even greater threat—and the shattering truth of their own destiny.