Brandon Sanderson 
Legion: Lies of the Beholder 

Stephen Leeds, also known as 'Legion’, has a unique mental condition. He can become an expert on any subject in hours . . . and with every new area of expertise a new 'aspect’ of Stephen is created.Is he schizophrenic? Possibly. Does that make him an incredible intelligence agent? Definitely. And this is his final, and perhaps his strangest, adventure. It begins with two unrelated events: the disappearance of Armando, one of Stephen’s many "aspects, " and an unexpected cry for help from Sandra, the woman who, many years before, helped him learn to live with his condition . . . and the combination of the two leads to a sinister high-tech firm specializing in advanced methods of human incarceration.An original, challenging, and utterly absorbing story, this unmissable novella showcases Stephen Leeds at his best: a compelling hero, and a man constantly struggling to understand and control his own divided nature.’An absolutely fantastic read’ Fantasy Book Review’The pulse of a thriller and the hook of a fascinating hero balancing on the edge of psychosis’ Library Journal