The National Cave and Karst Research Institute (NCKRI) has released the second edition of the book "Hypogene Speleogenesis: Hydrogeological and Morphogenetic Perspective," originally published in 2007 as NCKRI Special Paper no.1.
The original text has been thoroughly reviewed and corrected for grammar, style, and technical content by Drs. Lewis Land, Patricia Seiser, and George Veni. All revisions are minor.
Second edition of the book is freely available electronically as a PDF file via Speleogenesis Ebooks.
Here is a direct link to download the book
George Veni, Ph.D.
National Cave and Karst Research Institute
400-1 Cascades Avenue
Carlsbad, New Mexico 88220-6215 USA