The Subtle Knife suprised me. It brought in Will, a kid looking for his father. Surprisingly, Will's father found a door to Lyra's universe from ours. Will met Lyra in Cittagaze, a bridge between Lyra's world and ours. The city is filled with adult-eating spirits, specters. Lord Asriel is also trying to kill god. This book kept my attention towards it, unlike the Golden Compass, which became boring at the middle of part 3. The Subtle Knife also had a very intriguing plot. Good job Phillip Pullman!