The Subtle Knife by Philip Pullman.
What's better than one impulsive child with a reality warping macguffin? Two
Opening a sequel with the POV of a completely unknown character is always an interesting move, leaving the reader wondering if they'll be important going forward or killed off immediately to set up a new threat. Someone does kick the bucket in the first chapter but it's not Will Parry, our new deuteragonist from a version of Earth slightly more familiar than Lyra's. With him come a cast of modern villains and allies, as well as a surprise returning...