The Third Lynx

Frank Compton is a retired government operative who, in an earlier adventure, thwarted a scheme to bring the entire galaxy under enslavement. The story picks up with him facing the Modhri, a very old intelligence whose members share one mind through telepathy. Working in secret, the Modhri are fighting a hidden conflict against the star-spanning societies that depend on the Quadrail, the sole way to travel between stars.