Penguin Group (USA) Inc. is the U.S. member of the internationally renowned Penguin Group. Penguin Group (USA) is one of the leading U.S. adult and children's trade book publishers, owning a wide range of imprints and trademarks, including Viking, G. P. Putnam’s Sons, The Penguin Press, Riverhead Books, Dutton, Penguin Books, Berkley Books, Gotham Books, Portfolio, New American Library, Plume, Tarcher, Philomel, Grosset & Dunlap, Puffin, and Frederick Warne, among others. The Penguin Group (http://www.penguin.com/) is part of Penguin Random House.