Beginning Google Maps API 3 PDF Download for free:
Book Description:
This book is about the next generation of the Google Maps API. It will provide the reader with the skills and knowledge necessary to incorporate Google Maps version 3 on web pages in both desktop and mobile browsers.
It also describes how to deal with common problems that most map developers encounter at some point, like performance and usability issues with having too many markers and possible solutions to that.
You can also get this PDF by using our Android Mobile App directly: 
