books.google.com - What's the singular of paparazzi? Is graffiti singular or plural? What about kudos? Should I say empathic or empathetic? Is it a couple of dozen or a couple dozen? What's the correct pronunciation of concierge? Or schism? Or flaccid? In this book of crisp, precise, and often witty pronouncements on...http://books.google.com/books/about/The_Oxford_Dictionary_of_American_Usage.html?id=z_VmtjAU01YC&utm_source=gb-gplus-shareThe Oxford Dictionary of American Usage and Style