This book, The Golden Compass, is the first in the His Dark Materials trilogy by Philip Pullman. This critically acclaimed series has been adapted for both stage and screen. It's a captivating fantasy novel that explores themes of good and evil, free will, and the nature of reality. The book tells the story of Lyra, an orphan girl who lives in a world where people have animal companions called daemons. Lyra's world is a world of science and magic, where the Church has a lot of power, and where children are being kidnapped. She is thrust into a dangerous adventure when she learns about a mysterious substance called Dust and its connection to the missing children, and a new world of dangers. Lyra soon finds herself on a quest to uncover the truth of her world.