Baracuda 945, Nimitz Class: 2 paperback books

The most powerful warship in the world, the nuclear-powered U.S. Nimitz-Class aircraft carrier is seen as impregnable. But when the USS Thomas Jefferson suddenly disappears at sea, the Pentagon is stunned. There are no survivors, and all signs point to a tragic nuclear accident.While the world stands in shock, reports suggest that it was no accident. A rogue submarine armed with nuclear warheads may be on the loose. Where did it come from? How could it get within striking distance of the Thomas Jefferson ? Worse yet, where is it now and could it strike again? The tension mounts, and a deadly chase begins.