Tom Clancy Act of DefianceFOR JACK RYAN, THE GREATEST THREAT LURKS BENEATH THE WAVES . . . AGAIN Tom Clancy Act of Defiance plunges us into a high stakes world where a Russian superweapon poses an unprecedented threat beneath the waves. President Jack Ryan must devise a countermove in this thrilling new entry in the #1 New York Times bestselling series. US intelligence reports unrest within the Russian navy. Startlingly, their most lethal submarine, the Belgorod, has launched