Robert Ludlum's The Bourne Enigma (Bourne Series #13)

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.

The trail Karpov ha...