Books – letterboxing and geocaching

Books about letterboxing and geocaching that I have read:
It's a Treasure Hunt!	It’s a treasure hunt: geocaching & letterboxing distributed by CQ Products Inexpensive book with some good information about the 2 hobbies. Includes logbook pages for your personal journal. Also includes instructions about carving your own stamp and a few stamp images to try.
Local Treasures	Local Treasures: Geocaching across America by Margot Anne Kelley Really enjoyed this coffee table book. It’s not a ‘how-to’ manual, rather it is about personal discovery, investigation and a search for understanding about this past-time and how it affects so many of us. If you enjoy letterboxing for the adventure and the discovery of new places then this book may strike a chord with you, as it did with me.
The Letterboxer's Companion	The Letterboxer’s Companion by Randy Hall aka Mapsurfer A ‘how-to’ introduction to letterboxing. Fun, quick, easy read. The author is co-founder of letterboxing.org.