Chances are you’ll be standing around the water cooler after the Super Bowl talking about the commercials. And in Jonah Berger’s debut book, he wonders: Why do some products get more word of mouth than others? Why does some online content go viral? Why was the Budweiser commercial featuring dudes saying “Wassup?” a stroke of genius? Berger has outlined six criteria needed to ensure that products and ideas are contagious. Thought-provoking nonfiction for fans of Malcolm Gladwell’s The Tipping Point or Steven Levitt’s Freakonomics.