 The follow-up book, "Wild Cargo" (1932), again co-authored with Anthony, also became a bestseller and was adapted into a 1934 film of the same title in which Buck once again portrayed himself and also served as producer.During this time he was represented by George T. Bye, a New York literary agent.Buck furnished a wild animal exhibit, Frank Buck's Jungle Camp, for Chicago's Century of Progress exhibition in 1933.