Half Dead - Brandon Graham

The car accident took his wife and nearly killed him too, but Calvert Green''s problems are just beginning. He was a respected Russian literature scholar in Chicago, but due to severe head trauma, he''s now suffering from Cotard''s Disease - a rare physiological condition that makes him believe he''s dead. Calvert knows few details about the accident but believes there''s more going on than he''s been told, so he leaves the care facility determined to find the truth, and finds himself in a city terrorised by a murder spree and himself a suspect...