Robert Ludlum's the Bourne enigma

On the eve of Russian general Boris Karpov's wedding, Jason Bourne receives an enigmatic message from his old friend and fellow spymaster. In Moscow, what should be a joyous occasion turns bloody and lethal. Now Bourne is the only one who can decipher Karpov's cryptogram. He discovers that Karpov has betrayed his sovereign to warn Bourne of a crippling disaster about to be visited on the world. Bourne has only four days to discover the nature of the disaster and stop it.