His Dark Materials is a captivating fantasy trilogy written by Philip Pullman. The series follows the journey of a young girl named Lyra Belacqua as she navigates parallel universes, encountering various creatures and characters along the way. The story explores themes of free will, religion, and the nature of consciousness. The trilogy consists of three main books: Northern Lights (also known as The Golden Compass), The Subtle Knife, and The Amber Spyglass. Each installment deepens the intricate world-building and character development, making it a beloved series for readers of all ages.