Philip Pullman's personal website
The author's personal website contains useful information about the author and his novels.
An Interview With Philip Pullman
https://web.archive.org/web/20080305011900/http://www.moreintelligentlife.com/node/697
In this interview with Intelligent Life magazine, Philip Pullman discusses his inspirations and creative process in creating The Golden Compass. He also discusses his feelings about the controversy among religious groups that The Golden Compass inspired.
Paradise Lost - Book 1
http://www.dartmouth.edu/~milton/reading_room/pl/book_1/text.shtml
Here you can read and learn about the first book of John Milton's Paradise Lost, the epic poem that Pullman has said inspired him to write The Golden Compass.
Hate Crimes Against Travelers
https://www.crimeandjustice.org.uk/sites/crimeandjustice.org.uk/files/09627250208553449.pdf
This is a report on the frequency of hate crimes faced by the Roma people, the inspiration for the gyptians of The Golden Compass.