9780691096384 | Princeton Univ Pr, July 22, 2002, cover price $50.00 | About this edition: A guide for marine enthusiasts who seek intentional encounters with sharks enables readers to assess the risks involved, profiling the dangers associated with specific varieties and offering advice on how to make observations in and out of the water.

9780691096377 | Princeton Univ Pr, March 16, 2004, cover price $20.95 | About this edition: Hundreds of thousands of people have an intentional encounter with sharks every year, and shark-watching has become a multi-million dollar business.

9780563537946, titled "The Shark Watcher's Handbook: A Guide to Sharks And Where to See Them" | Bbc Pubns, July 25, 2002, cover price $31.95 | About this edition: With the help of dive operators and shark experts in over 50 countries, this guide covers what the enthusiast needs to know about sharks and shark-watching - the history, techniques, risks and controversies of this increasingly popular activity, including a directory of 250 shark-watching hotspots.