Do you need book? Or not this book?

I recently updated the iPhone's ebook, and there are a lot of new ones. But I think there are actually enough resources. It seems that there is no need to read some irrelevant books.
Think about it. Most books only teach you how to get started. But to combine it with practice, only multi-read Code, Multiple exercises. Writing applications seems suitable for fast food development.
You can write documents within one month. Program. Now more and more people are entering iPhone development. In fact, like other platforms, a complete team is needed to make good things.
Deliberately seeking for new things may not be a magic weapon to win. It would be nice to make every detail look tiny.
This book, iPhone Games projects
Http://www.apress.com/book/view/1430219688
It is helpful to open a volume. Now I am looking at 3d things. There are more concepts than 2D.

Supplement: after reading this book, I feel that it is not deep enough. It is just an empty saying. Maybe a book like inside cocos2d is needed to satisfy my appetite. However, when I think about it, I think some of the more advanced topics are supplemented by other books. This book only tells the relevant basic content. The exact name of this book should be called, iPhone basic 2D games projects.