His Dark Materials
Websites
Wikipedia
The first place we all look.
BBC Radio 4
The BBC's website for its dramatisation of the trilogy includes a dictionary, quizzes, and a webchat with Philip.
www.bbc.co.uk/radio4/arts/hisdarkmaterials
hisdarkmaterials.org
Founded by Lord Asriel (web name), it includes essays, fan art, ineractive maps of Lyra's world, and a video game.
bridgetothestars.net
Includes interviews with Philip, news stories and reviews. Also has cover art for over 130 different editions of His Dark Materials.
darkmaterials.com
Describes itself as an unofficial fan site. Includes its own FAQs.