It''s unclear to me which type of guide you are looking for. Rough Guides and Lonely Plant Guides are great for those who seek land travel-type info, including history, culture, govt. and other regional info. We use them regularly to help us understand where we''re cruising...or otherwise, why would we bother to be there?
OTOH sailing guides are intended to offer weather & routing info, port and anchorage details, clearance info, etc. As such, Doyle''s guides have in the past been the standard choice in the Caribbean altho'' I find them - mostly - a waste of good money. Steve Pavlidis has recently been authoring a series of new guides on the entire Caribbean and his sketch chartlets alone make them stand out in my mind above the Doyle guides. Doyle will tell you where to get a hamburger or find a great bar; if that''s your interest, buy Doyle. If you want a mix of history & culture but also the nitty gritty on anchoring, berthing, clearing, etc., I find the Pavlidis guides far better.