Looks like it has some good info, but you need a copy editor. If I'm going to shell out $30 for a book, I don't want to see typos and strange run-on sentences. Those sorts of things make the book much harder to read.
For example, take your home page:
"You’re interested in making games or other interactive HTML5 apps, but you don’t quite know were to start and what you will need to accomplish that."
For example, take your home page: "You’re interested in making games or other interactive HTML5 apps, but you don’t quite know were to start and what you will need to accomplish that."
That should be "where", not "were".