Bluewater Hunting & Free Diving is a well illustrated and practical guide to the sport, but is also entertaining with its stories of sharks, line tangles, blackouts and inspiring stories of marlin hunters, jewfish hunted by sound alone, bluefin rocketing by at 50 mph), and more. The main purpose of this book is to entertain. It sometimes uses an educational and instructional approach, but since freediving and spearfishing are inherently dangerous endeavors, be careful with the information presented here.