Try "Field guide to sailboats of North America"
Tim, I've seen Sherwood's "A field guide to sailboats of North America" in bookstores and it is packed with line drawings and has a chart of sail logos on the end papers. It tends to be heavy on old dinghy racing classes, but it also has racer-cruisers and should be good for identifying most of what you might see. (link to Amazon.com's page below).