The Lagrangists — Mack Reynolds

L-5, a point in the Earth-Moon System where orbits are forever and the new age of Freedom and Plenty can begin. Now, they're trying to kill the man in charge of the first L-5 colony, and Private Eye Rex Bader is the man who will have to find and stop them. But who are the killers? The Soviets? The Mafia? "Friends of the Earth?" Only time -- and blood -- will tell.