The Moon and Beyond: Book I in Saga of the Lunar Free State

This is a near-future science fiction novel. The year is 2025. The scientists and engineers at the Deep Space Research Institute are very intelligent people -- so intelligent, in fact, that they have figured out how gravity works. More importantly, they've figured out how to make gravity work as a method of propulsion. Of course, they are going to tell everyone about it... eventually. But first, they have a few things to do, like build themselves some gravity-powered space ships and establish a permanent settlement on the Moon. That's assuming the government doesn't find out what they're doing and put a stop to it....