For Sale on Amazon.com the Cave Conservation and Restoration (Paperback) by Edited by Val Hildreth-Werker and Jim C. Werker (Author), Val Hildreth-Werker and Jim Werker (Editor) List Price: $39.00 Availability: In Stock. Ships from and sold by Amazon.com. Gift-wrap available. Only 2 left in stock--order soon (more on the way).