A good book. Well-written with helpful examples. It looks like they tried to make things a lot better with HTML5.
The book does a great job of explaining HTML5 features. It presents everything in the form of a problem and a solution. It shows features that are widely supported, features that are supported by some browsers, and features that aren’t supported by any browsers yet. You get workarounds for pretty much every feature just in case the user is using a browser that doesn’t support the feature.