First of all I thought, it's not a hugh big book for a big search topic. But alreay after some pages I noticed, did the author just speak about the important stuff in developement. The code style is very nice and logic, so it gave me a very good access for each coding in java script. In the area of HTML5 games there are not many books, but this one is defently one of the best books I've ever read. For the one who wants to learn more about web games, this book is a must!