Who has the introduction of this book, Gadfly? Please say it!

The Gadfly was one of the representative works of Voltaire, published in 1642. The protagonist of the novel was a businessman named Adam Buchanan. He met a girl named Emily on a business trip. The emotional entanglement between Adam and Emily and their social background constituted the main plot of the novel. The Gadfly was a work of strong thought and artistic quality, revealing the dark side of British society and the distortion of human nature at that time. Through the novel, he criticized the corruption and autocracy of the church at that time, and also expressed his firm belief in freedom, equality, and human rights. The novel became one of the classics in the history of world literature with its unique narrative technique and profound ideology.