This is an OK book in general, the printing quality and design are nice, but the title is misleading. The title is riding this trendy HTML5 wave, but the main focus of this book is not HTML5/ CSS3. The book is about overall web design and basic HTML/CSS markup with HTML5/CSS3 coverage.
This "quick guide" is actually a heavy 550 page brick, which covers stuff not even related directly to HTML5, e.g. how to size images in Fireworks and Photoshop, how to do FTP file transfer with FileZilla program and how to "Secure a domain name and publish your site".
Also it contains a lot of trivial stuff such as creating a link to another web page, making text bold, starting a new paragraph with P tag, or creating external style sheets file. Old school HTML4 and CSS2 topics cover about half of this brick. Yet, authors were unable to find any space in this book for many new HTML5-specific topics such as most HTML5 APIs, which are parts of HTML5 specification, e.g. Canvas, Web Sockets, Microdata, Web Messaging, Web Workers, HTML5+RDFa, etc.
Also there is no coverage for the new HTML5 syntax rules, no HTML5/CSS3 browser compatibility info, and no list of new tags.
The book does include new HTML5 markup coverage but this is not enough to claim that HTML5 is the main focus and you will "Learn HTML5 the quick and easy way" (back cover). It seems that instead of re-writing this book from scratch, authors just merged the old CSS QuickStart Guide 5th edition with HTML QuickStart Guide 6th edition providing some facelift updates. The very old Windows XP screenshots look odd in this brand new 2012 "HTML5 book".