Golden Compas trilogy by Philip Pullman (Score 1)

Although the trilogy is "targeted" at young adults, The Golden Compass and the rest of the series are a great story of alternate universes and Paradise Lost, revisited. Adventure, witches, mythology, religion and metaphysics, oh my.

The series is "His Dark Materials", and the books are The Golden Compass, The Subtle Knife and The Amber Spyglass.