For those of you who have a Kindle or other devices running the Kindle app, the Kindle version of Exploring With GPS: A Practical Field Guide for Satellite Navigation is currently free at Amazon.com.

Keep in mind that the "free" books are usually only available for a short duration so you need to carefully check the price first to see if it is still free.

All standard disclaimers apply...

_________________________
Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock