I'm listening to this novel from Libravox. It's a sequel of H.G. Well's War Of The Worlds, not endorsed by Wells but endorsed by Edison. Thomas Edison is chosen by the world leaders to lead a counter attack on Mars after the actions of Well's story. Edison builds a fleet of spaceships with troops armed with dis-integrator guns. I see war game potential for you folks that like sci-fi. There's also a hot earth girl who IS NOT a Martian Princess.
See the link to the over view of the story and the Libravox audio download.