Meanwhile Rangers Michael Harrison and Carl Lehnert had explored the corresponding South Tonto across Over the Edge: Death in Grand Canyon. $ Description. Puma Press,Nature. Michael Patrick Ghiglieri, Thomas M Gripping accounts of all known fatal mishaps in the most famous of the World's Seven Natural Wonders. Two veterans of ades of adventuring in Grand Canyon chronicle the complete and Two veterans of ades of adventuring in Grand Canyon chronicle the complete and comprehensive history of Miss