I bought this pamphlet (it's not a book but a fold-out laminated sheet) as well as the Princeton Birds of the West Indies Guide for taking on a cruise to the Caribbean. My plan was to carry this in my backpack during the day in case I see a bird and want to look it up, and to leave the Princeton guide in the cabin. In the end though I ended up using just the Princeton guide, even though I took this pamphlet with me in the field, and here's why: it turns out most of the birds in the Caribbean each appear only on certain islands, or sometimes just on a single island, and the species from different islands can look very similar. So unless you're very good at distinguishing similar birds by their looks, you really need a book that tells you the range of the birds. It also helps to know how common the birds are, which the Princeton guide also tells you; that way if you saw a dozen of a bird during a stroll through a town and you think it's a species that's listed as very rare in the book, you'll know you need to double-check your hypothesis. I'm very much a beginner at bird identification, but with the Princeton information about the range I could usually figure out which of several similar bird species I saw, because usually only one of them was both common and found on the island we were visiting. I'd say save your money and get the Princeton book instead of this pamphlet.