His Dark Materials - The Subtle Knife

The Subtle Knife is the second book in the "His Dark Materials" trilogy. The action takes place in our world and in other worlds that are neither our own nor Lyra's. We meet Will, who also plays a central role in the plot, in tragic circumstances and we are introduced to the fabulous concept of windows between universes.

Synopsis

The second book in the "Dark Materials" trilogy. Will is 12 years old and he's just killed a man. Determined to discover the truth about his father's disappearance, he steps through a window into another world. There, he meets a girl called Lyra who, like himself, is on a mission.