HTML5: Up and Running by Mark Pilgrim
My rating: 3 of 5 stars
This short book is packed with HTML5 examples, aimed at those already familiar with HTML. Because I build websites, not web apps, I was more interested in the new semantic elements, forms, audio, and video than in canvas, geolocation, local storage, and offline web apps.
This book explains more of HTML's history than other HTML5 books I've read, which I actually enjoyed. I didn't know much about microdata, so it was enlightening to see how search engines can extract information from microdata to provide better search results, such as in Google Rich Snippets.
I liked Introducing HTML5 better.