RaveElleFor any true fan of American comedy, Improv Nation is a sweeping and highly entertaining anecdotal history. Moreover, the book offers a dizzying procession of top-tier comedians and actors, led by the godparents of improvisational comedy, Mike Nichols and Elaine May ... Without being ponderous, Improv Nation chronicles the trajectories of such well-known names as John Belushi, Gilda Radner, Robin Williams, Stephen Colbert, Steve Carell, Martin Short, Adam McKay, Christopher Guest, John Candy, Judd Apatow, Kristen Wiig, and much of the rest of American comedy’s Sgt. Pepper cover.