Doyle's guides not only give the navigation side of cruising, but also a head's up on the officials (their hours and costs), touring, shopping and eating ashore. Really can't be beat his guides and you'll wish he made them for everywhere if you move beyond them.
The Virgins however, are covered very well by Nancy and Simon Scott's book, Cruising Guide to the Virgin Islands.
Most of the important info doesn't change significantly, so if you buy a current guide it will last many years as you are learning the changes from personal experience, if you sail the area more than once. Under no circumstances trust any buoy or light information, from the guides or charts. Use your eyes and common sense, only. Things can change overnight and they aren't too swift to replace or reposition buoys that have gone off station down this way.