Currently planning a vacation to Hawaii, and this book was great from the very beginning. Up front it offers a handy table to choose your island: are you interested in beaches, nightclubs, golf, scuba diving, snorkeling, hiking, kayaking, etc.? Each island is rated for how much of each activity it has. That helped me immediately narrow my focus to Kauai and the Big Island.
Lots of useful, practical information from people who have been there. This is invaluable.