Deep Shadow

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One of the joys of writing is doing research. Details regarding Florida geology and cave diving required and received particular attention. I would like to give special thanks to Florida geologist Jason Sheasley, and also William and Cameron Barton, for reading an early draft of the manuscript and offering their insights. Lee Florea of the Karst Research Group, Department of Geology, University of South Florida, and Dr. Bruce Flareau, M.D., provided valuable information on air bells and karst topography. Bob Alexander of NAVSYS Inc. was of great assistance in helping me select a first-rate underwater night vision system, which I used often as reference while writing this book. For assistance in research regarding Florida exotics, monitor lizards, neurological pain, cerebral diseases, the effects of blood-thinning poison on stroke victims and the luminosity of various dive watches, I want to thank the following people, in no particular order: Oklahoma authority Henry Baker; Ken Warren, public affairs officer, South Florida Ecological Services office, U.S. Fish and Wildlife Service; Jenny Edgar of the Mermaid Restaurant; Dr. Brian Hummel; Captain William Gutek; Dr. Donald Slevin; Captain Russ Mattson, Marvin Metheny; Nitrox diver Audrey Fischer; Dr. Chance Wunderlich; chronograph experts Eric Loth, David Camba and Alexandra Castro; maestro O. J. Whatley; and marine biologist/ watch entrepreneur Dr. John Peterson. If there are factual errors in the narrative, they are wholly the fault of the author.

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