Legion: The Many Lives of Stephen Leeds - Brandon Sanderson

Stephen Leeds is schizophrenic (. . . probably . . .) and he's in demand. But not for his own skills - his clients want to tap into the imaginary experts that populate his mind - and it's getting a bit crowded in there. One of his many 'aspects' is a trained soldier, another a psychological expert, a third is a librarian, and all of them want to help him solve problems, making him an exceptionally versatile intelligence agent. If you need a stolen corpse retrieved or a missing inventor found, Stephen Leeds is the man - or rather, the team - for the job. But managing a team is a challenge in itself, all the more so when some of the team feel they know better than Stephen himself . . .