Barnes & Nobles is hosting an author event featuring Malcolm Gladweel and David Gran at their Union Square branch, March 18, 2010, 7PM. Malcolm Gladweel is the author of What the Dog Saw, and Other Adventures, and David Gran is the author of The Devil and Sherlock Holmes: Tales of Murder, Madness, and Obsession. Barnes & Nobles Union Square is located at 33 East 17th Street, New York, NY 10003. 212-253-0810