Edison's Conquest of Mars, by Garrett P. Serviss, is one of the many science fiction novels published in the nineteenth century. Although science fiction was not at the time thought of as a distinct literary genre, it was a very popular literary form, with almost every fiction magazine regularly publishing science fiction stories and novels. "Edison's Conquest of Mars" was published in 1898 as an unauthorized sequel to H. G. Wells's The War of the Worlds, but did not achieve the fame of its predecessor. The book was endorsed by Thomas Edison, the hero of the book -- though not by Wells. (Summary from Wikipedia)