I just finished the book The Amber Spyglass by Philip Pullman. This is the third and final book in the series titled His Dark Materials. Personally I think the ending of the series is a bit weak but for the age group it is targeted to (teens) it probably makes more sense. After finishing the series, I don't think I would read another book by the author.

I listened to The Subtle Knife by Philip Pullman during my road trip. This is book two of the trilogy titled His Dark Materials

I listened to The Golden Compass by Philip Pullman during my road trip. This is book one of the trilogy titled His Dark Materials