The Quincunx of Time

Earth is Queen of the Universe, but someone is trying to destroy her. By shattering time forever! Travel at light speeds is common, and Earth is first in the universe, reigning over many worlds. But in order to rule effectively, Captain Robin Weinbaum, head of Security, needed an extremely advanced communications system. He got it with the Dirac transmitter, the first machine capable of sending instantaneous messages anywhere in the universe. The only problem was that someone called J. Shelby Stevens had a machine that could do the impossible – tap the transmissions before they were even made! It was Weinbaum's job to find Stevens. And unless he did, time would be abolished and the universe closed to Earth forever!