In 2009 Alan Moore and Steven Moore are bringing out The Moon and Serpent Bumper Book of Magic. (If you follow the link you'll have to scroll down the page to find the relevant info.) It's a comic revealing messers Moore and Moore's thoughts on the history of magic and how spells work in real life.
Yes, I know, this sounds like some feeble New Age claptrap but I find Alan Moore's musings on magic fascinating. Not that I neccesarily believe everything he comes out with but it's nice to bounce around ideas in a different sphere of thought every now and again. Because that's the main thrust behind Moore's magic: ideas. Or, as he might put it, information. The entire universe can be viewed as an interplay between different forms of information -- Moore just happens to like processing that information through magic spells and rituals. It gives him a structure on which to hang his metaphysical musings. And as he himself admits just because the ideas and concepts he plays around with work better for him when he approaches them from within a magical framework that approach may not work for other people.
Also out from Moore, hopefully some time this year is the DVD The Mindscape of Alan Moore. This documentary was supposed to be out last year but until it finally befomes available I'll just have to make do with the trailer.