The Gadfly was one of the most famous novels of the 20th century by Isaac Asimov. The Gadfly tells the story of a young soldier, Ingmar Bergman, during the Second World War. He wandered among different armies and party organizations, experienced many dangers and challenges, and discovered his true mission and beliefs. The novel is narrated from the perspective of Gadfly, and through his experience, it probes into the topics of war, human nature, politics, and faith. The novel had been translated into many languages and had a wide readership and high ratings around the world. It was one of the most famous works of Asimoff and a classic in the history of world literature.