I'm just curious what's on everyone else's reference bookshelf? You know - the book(s) you go to when you can't remember grammar or punctuation rules, editor marks, you're looking for a snippet of html for your blog, etc. What reference books do you always go to? What's sitting on your shelf?
My reference shelf varies from week to week, depending on what I'm working on for the week. (My reference shelf is actually just the top ledge of my rolltop desk - a pile of stuff I'm using for various stuff I'm working on.)
I'm actually thinking about updating some of my core reference books, but before I just buy the latest editions of what I already have, I thought I'd see what other people use.