Caves and Karst of the USA

Edited by Art and Peg Palmer, this is the guidebook for the 2009 International Congress of Speleology (ICS) and NSS Convention, and is a guide to the significant cave and karst areas of the US, as well as 67 pages of additional information about the regions and countries neighboring the USA.  It is a beautiful compilation of articles from various authors from around the US.  Its 445 glossy full- color pages feature maps, compiled research, and more.