I received this as a gift. It's a science fiction novel, but that really only comes into play in the last third (maybe last quarter) of the book. It's also a romance, and an adventure tale. Sure, there are dolphins and other cetaceans swimming though this book, but it's mostly the story of Kevin and Natalie. Gotta say, I didn't like Kevin much at first, but then I realized I wasn't really supposed to. The seascape of/around south Florida is lovingly described in this book - almost like it's the third main character. A few small quibbles, but those were my issues. Really well written.