From amazon.com:
Now also available in the complete collection Legion: The Many Lives of Stephen Leeds.
From #1 New York Times bestselling author Brandon Sanderson, Stephen Leeds is back in a double-length novella that Library Journal says has "the pulse of a thriller and the hook of a fascinating hero balancing on the edge of psychosis."
It's not his own genius that Stephen Leeds gets hired for. Clients want to tap into the imaginary experts that populate his mind—and it's getting a bit crowded in there.
Now Stephen and his internal team of "aspects" have been hired to track down a stolen corpse—but it's not the corpse that's important, it's what the corpse knows. The biotechnology company he worked for believes he encoded top-secret information in his DNA before he died, and if it falls into the wrong hands, that will mean disaster.
Meanwhile, Stephen's uneasy peace with his own hallucinations is beginning to fray at the edges, as he strives to understand how one of them could possibly have used Stephen's hand to shoot a real gun during the previous case. And some of those hallucinations think they know better than Stephen just how many aspects his mind should make room for. How long will he be able to hold himself together?