The Lucid Nightmare

The Lucid Nightmare is a novel in which the main character goes back to the moment where his wife is murdered to find out how it happened and who the killer was. He was there in real life, but he was shot before he could see what was going on and only subconsciously witnessed it. He solves the murder and goes back to his lucid state frequently, until one day it all has a different outcome than he expected...