I'll admit I haven't read the CSS spec, but I have been reading the canvas element spec in detail, as there's little good, deep reference material for it. It's

I'll admit I haven't read the CSS spec, but I have been reading the canvas element spec in detail, as there's little good, deep reference material for it. It's readable, or at least understandable, but it's challenging compared to more traditional reference books (like MDN's presentation, for example).