Tom Clancy's Commander-in-ChiefA Jack Ryan adventure thriller written by Mark Greaney, Clancy's last and most successful collaborator When the great bear growls . . . Russia is hurting. It's economy is tanking and its 'adventures' abroad have proved costly. President Volodin knows that his own survival depends on restoring Russian pride. . . . the world trembles When a series of explosions, assassinations and attacks rock the global order, only one man in the West recognizes the