Because if you’re going to all the time and trouble of building a website you want people to actually be able to use it. There really is a lot of common sense in this book, and a lot of hard truths – it changed the way I approach web design.
Fantastic guide to HTML5 and CSS3. It covers all the basics, and explains how and when to use all the new HTML elements which I find invaluable. I refer to this constantly as I’m working.
A well written and interesting book about the theory and practice of web standards. It’s a quick read and has lot’s of practical advice and usage guidance . This one is sat on my desk and gets regular use as a reference. There’s not a lot of theory about why standards are important here though, so if that’s what you’re looking for I’d advise starting somewhere else.
Two short books from A Book Apart, the people behind A List Apart. Between them they cover everything you need to get started with responsive web design. Another couple of books that are sat on my desk full of post it notes. I used these every day when I started building responsive sites!