I don't know the author, but...
... I am biased in favor of this book:

Chris and Monique Fallows are a naturalist-photographer team based in Cape Town, South Africa, who produce documentaries and conduct adventure trips in hopes of protecting marine life, especially sharks. I don't know them, but there are not that many of us with the same name, so we have to stick together. I bought one of their books when I saw it at the bookstore of the wonderful Two Oceans Aquarium in Cape Town several years ago. I'll get this new one too. Maybe they'll do the same for mine!