Andre Lewis, Michael Purvis, Jeffrey Sambells, Cameron Turner, "Beginning Google Maps Applications with Rails and Ajax: From Novice to Professional"
The Google Maps API remains one of the showcase examples of the Web 2.0 development paradigm. Beginning Google Maps Applications with Rails and Ajax: From Novice to Professional is the first book to comprehensively introduce the service from a developer perspective, showing you how you can integrate mapping features into your Rails-driven web applications.
Proceeding far beyond simplistic map display, you'll learn how to draw from a variety of data sources such as the U.S. Census Bureau's TIGER/Line data and Google's own geocoding feature to build comprehensive geocoding services for mapping many locations around the world.