This is a fairly basic introduction to using the Google Maps API 3 via Javascript. It doesn't cover Google Earth and it doesn't cover any wider issues of creating map-based applications.

Chapter 1 gives the overview - history, API and basics of mapping, co-ordinates etc. This isn't rocket science in that it explains what latitude and longitude are rather than going into spherical geometry or the geode.

Chapter 2 is about upgrading to API 3 and Chapter 3 is about creating your first map. From this point the book delves deeper into the various facilities. MapOptions, Markers,.Marker icons, InfoWindow tips and tricks, polylines and polygons.

All of this is explained in a slow and steady style with lots of hints and tips on the way. What you make of the tips depends on how advanced your programming skills are. For example, "A clever way of dealing with lots of different marker icons" is to use an array. Is this clever? It might be if you didn't know about arrays - but then you probably should read a book on Javascript first. Other tips and discussions vary in their level - from using sprites to finding icons.

Chapter 9 is about managing large numbers of icons but via a third party utility library rather then from first principles and the final chapter is on using Geolocation services. The book closes with a useful API reference - but you will probably find the Google API reference just as useful.

As its title suggests this really is a "beginning" Google Maps book. While it does have an introduction to Javascript within it you would be well advised to learn some Javascript before trying to make use of Maps which is a 100% Javascript API. It is a shame that the book doesn't cover some of the more interesting topics - KML, mobile etc but if you are looking for a real 100% beginner's book then this one fits the description.

Further reading:

Getting started with Google Maps