Poseidon's ArrowIn 1943 a submarine returning from a secret mission is attacked, its vital cargo believed lost . . . Three quarters of a century later, NUMA director Dirk Pitt is asked to help locate a missing person: the scientist responsible for the design of the revolutionary Poseidon's Arrow submarine. This craft is so advanced and dangerous that any government would kill to possess it and not only has its designer disappeared, but so too have the plans. But this