Exploring With GPS: A Practical Field Guide for Satellite Navigation
Wilderness Navigation: Finding Your Way Using Map, Compass, Altimeter, & GPS, 2nd Ed. (Mountaineers Outdoor Basics)
The Complete Idiot's Guide to Geocaching, 3e (Complete Idiot's Guides (Lifestyle Paperback))
The Backpacker's Handbook, 4th Edition
Ultimate Navigation Manual