"Harpoon" does a wonderful job of exploring whaling from the hey day of the 19th century to the factory fleets of the mid 20th to the current days of "scientific" whaling.
The book is roughly broken into sections according to whale species, and one of the best parts of "Harpoon" is reading about the different major whale species. Darby gives us a glimpse into the lives of these whales, from the days when one could see Right whales off the Australian coasts every day up until the current day, when scientific seach planes are hard pressed to find them.
In addition to telling us the whales, and the nuts and bolts of whaling itself, Darby follows the evolution of the International Whaling Committee, and all the diplomatic drama around trying to preserve, utilize, and protect the world's whales.
This was an incredibly informative book, and not a page went by where I didn't learn something new. While very anti-whaling, Darby does not demonize whalers themselves, up to the point of interviewing retired whalers themselves. This is an excellent read anyone who is interested in whales, whaling, or nautical history would enjoy.