NATIONAL BESTSELLER A Book of the Year Selection for Inc. and Library Journal "This book picks up where The Tipping Point left off ." -- Adam Grant, Wharton professor and New York Times bestselling author of ORIGINALS and GIVE AND TAKE Nothing "goes viral." If you think a popular movie, song, or app came out of nowhere to become a word-of-mouth success in today's crowded media environment, you're missing the real story. Each blockbuster has a secret...