A book that tackles the very difficult subject of growing up, in a form that involves killing God himself. And not just any God-Pullman is quoted as saying "If there is a God, and he is as the Christians describe him, he deserves to be put down and rebeled against"
The Golden Compass, The Subtle Knife and The Amber Spyglass are the three books in the series. And they are so damn good. I can't finish the last one because I'm scared of it ending.