This novel was removed from dictatorships in Europe during the the 1920s and 1930s. From Wikipedia: "The Call of the Wild is a novel by American writer Jack London. The plot concerns a previously domesticated dog named Buck, whose primordial instincts return after a series of events leads to his serving as a sled dog in the Yukon during the 19th-century Klondike Gold Rush, in which sled dogs were bought at generous prices."

This novel was removed from dictatorships in Europe during the the 1920s and 1930s. "The Iron Heel is a dystopian novel by American writer Jack London, first published in 1907. Generally considered to be 'the earliest of the modern Dystopian,' it chronicles the rise of an oligarchic tyranny in the United States."