Indignez-vous is arguably France's most surprising literary bestseller. Since it was published by a small company based in southern France last October, it has sold over 600,000 copies. The 30-page booklet calls on readers to get angry and take responsibility for society's woes. And it calls on the French to re-embrace the values of the French resistance during World War II. The book was written by Stéphane Hessel, the 93-year-old former diplomat and hero of the resistance.