The following review will appears in Library Jounal later this month. The review isn’t online yet,but we got an advance copy from the publisher.
We’re psyched. 
Here is an excellent introduction to this emerging sport. For the uninitiated,geocaching is a sort of treasure hunt wherein participants navigate their way to prehidden treasures (caches) using GPS technology. Caches,which are secreted by other practicing geocachers and logged on geocaching web sites,can be located anywhere from parking lots to forested areas.
Longtime tech writer Gillin and his wife,Dana,an editor,are the perfect ambassadors for geocaching. Their book imparts all the how-to that a budding enthusiast needs to get started while also including lots of funny and interesting anecdotes that will communicate to the completely unfamiliar reader just why the sport is exploding in popularity. The book is broken down neatly into chapters on all aspects of geocaching,including hiding,seeking,and the requisite technology.
VERDICT
This is a lively and well-written introduction to a sport that is rapidly gaining followers. It makes a fine source for instruction—its clear writing and personable tone far surpass similar instruction books—but it is also simply an interesting read for all curious about the phenomenon.
—John Helling,Bloomfield-Eastern Greene Cty. P.L.,IN