The Confession and Memoirs of Felix Kruer, Part One, was a novel by Thomas Mann that recounted the experiences of the protagonist, Felix Kruer, in the early 20th century. The novel began with Krul's memories, describing his poverty and misfortune in his youth and his later experience as a swindler and spy. As the story developed, he gradually revealed his true identity and described his contact and cooperation with the German government and the Nazism. The novel depicted the social and political environment of that era through Kruer's perspective, including the expansion and war crimes of Nazism, as well as the survival and fate of people. At the same time, the novel also shows the complexity of human nature and the dilemma of moral choice. It also probes into human behavior and psychology. The Confession and Memoirs of Felix Kruer, Part One, is a profound historical novel that profoundly reflects the fate of the world and mankind in the early 20th century.