| title | ISBN-13 | year of publica-
tion | other author(s) |
|---|
| Northwest Treasure Hunter's Gem & Mineral Guide | 978-0-943763-24-8 | 1999 | Kathy J. Rygle |
| The Treasure Hunter's Gem & Mineral Guides to the U.S.A.: Northeast States: Where & How to Dig, Pan, and Mine Your Own Gems & Minerals | 978-0-943763-39-2 | 2003 | " |
| The Treasure Hunter's Gem & Mineral Guides to the U.S.A.: Southwest States: Where & How to Dig, Pan, and Mine Your Own Gems & Minerals | 978-0-943763-38-5 | 2003 | " |
| The Treasure Hunter's Gem & Mineral Guides To The U.S.A.: Where & How to Dig, Pan And Mine Your Own Gems & Minerals: Northeast States | 978-0-943763-49-1 | 2006 | " |
| The Treasure Hunter's Gem & Mineral Guides to the U.S.A.: Where & How to Dig, Pan, and Mine Your Own Gems & Minerals: Northeast States | 978-0-943763-27-9 | 1999 | " |
| The Treasure Hunter's Gem & Mineral Guides To the U.S.A.: Where & How to Dig, Pan And Mine Your Own Gems & Minerals: Northwest States | 978-0-943763-48-4 | 2006 | " |
| The Treasure Hunter's Gem & Mineral Guide: Where & How to Dig, Pan And Mine Your Own Gems & Minerals: Southeast States | 978-0-943763-51-4 | 2006 | " |
| The Treasure Hunter's Gem & Mineral Guide: Where & How to Dig, Pan And Mine Your Own Gems & Minerals: Southwest States | 978-0-943763-50-7 | 2006 | " |