On the eve of Russian general Boris Karpov's wedding, Jason Bourne receives an enigmatic message from his old friend and fellow spymaster.

The trail Karpov has been following leads Bourne to Cairo and the doorstep of Ivan Borz, the elusive international arms dealer infamous for hiding behind a never-ending series of false identities, a man Bourne has been hunting ever since he abducted former Treadstone director Soraya Moore and her two-year-old daughter and brutally murdered Soraya's husband.

The clock is ticking, and Bourne has less than four days to solve Karpov's riddle—and hunt down Borz—if he hopes to prevent a cataclysmic international war...

The Real Book Spy commented, "Van Lustbader knows just how to keep fans on the edges of their seats as he lays out the story’s plot, sucking them in and setting up for a climactic ending that doesn’t disappoint.

"[1] Ray Palen of The Book Reporter stated that, "The Bourne Enigma is a rollicking roller coaster ride of spy games and colorful characters set against the expected multiple international locales...This is an enjoyable and fast-paced read that faithfully continues the enigma that is Jason Bourne.