This book is an excellent and still pretty up-to-date book on PNG's many and varied dive sites. Good way to plan a dive trip, by seeing which site descriptions most appeal to you. PNG's dive sites are very variable; fabulous visibility one day can be down to murky on the next. Little explored country in terms of diving, new sites are being identified all the time. Hopefully they'll update the book in a few years to include the many sites not known at the time it was first published. All in all, a very helpful and thorough book.