I used this Bahamas travel guide for a recent trip to Nassau. It was informative, but I didn't like the maps for Nassau (see pages 36, 38, and 39) b/c they lacked alot of details and were hard to find places.
I also bought the Bahamas travel guide by Fodor's Travel and liked it better than the Moon guide. The Fodor's guide has more detailed maps of Nassau on pages 56, 57, 66, and 67 and it's easier to find places. The Moon guide is okay, but I recommend the Fodor's guide if you have a choice.