I know I have returned to it frequently...and I know I will continue to do so. Philip Pullman. The extraordinary world of Philip Pullmans bestselling trilogy is explored in all the detail any fan of the books will ever need. With in depth, chapter referenced sections on characters, places, creatures, sciences, languages, and much more, this brilliant work by Laurie Frost has become the official, and definitive, reference guide to Pullmans books.