His Dark Materials is a fantasy series by Philip Pullman. It consists of three main books; The Northern Lights (or The Golden Compass in America), The Subtle Knife and The Amber Spyglass, as well as two spinoff books, Lyra's Oxford and Once Upon A Time In The North. A series set before, during and after the main trilogy called The Book of Dust is in the works, and at the point that this is being written, the first volume (La Belle Sauvage) has been released. Another spin off book, based on Will, is planned. There's an adaption of the first book into a movie (which I personally didn't really like, so I won't mention it beyond this comment), a video game based off this movie, a radio show, a stage play and a graphic novel. Overall, the series isn't that powerful (infact it has one of the weakest characters of all time in it), but has a lot of hax, such as predicting the future, soul manipulation and travelling between universes. The series spans a multiverse, and there are a notable universes, like the main one (where the soul manifests outside the body as a daemon, or familiar), our universe, the mufula universe, the world of the dead and infinite more.