The Hunt for Red October (Jack Ryan, #3)

by Tom Clancy

The agent’s code name was actually CARDINAL. The highest ranking agent-in-place the CIA had ever had, he was the stuff that legends are made of. CARDINAL had been recruited more than twenty years earlier by Oleg Penkovskiy. Another legend—a dead one—Penkovskiy had at the time been a colonel in the GRU, the Soviet military intelligence agency, a larger and more active counterpart to America’s Defense Intelligence Agency (DIA). His position had given him access to daily information on all facets of the Soviet military, from the Red Army’s command structure to the operational status of intercontinental missiles. The information he smuggled out through his British contact, Greville Wynne, was supremely valuable, and Western countries had come to depend on it—too much.