Nice, I forgot to search for alternate sources. It's a very nice gallery (with some maths too) of fractals, I'd be happy to have other sources for more complex and recent knowledge about them.
Well, it looks like a nice book and you can read it online or download it (there's a link at the top). The "Brainfilling" title is probably a pun to make the title more interesting.
EDIT: I missed the “Read Online” link - it is indeed a whole book about space-filling curves with lots of pictures.