Travis, Nigel. The challenge culture : why the most successful organizations run on pushback / Nigel Travis. - New York, NY : PublicAffairs, 2018. - viii, 270 p. ; 25 cm. Includes index ISBN: 9781541762145 Subjects--Personal Names: Travis, Nigel. Subjects--Topical Terms: Businessmen--United States--Biography.Corporate culture.