As far as "Ghost Story" is concerned; first I want to say I don't like this novel very much, so what I'm about to say is an explanation, but not a defense of the novel. Also, I'm not trying to be cheeky or making a joke here. I am quite serious.
Whether Jim consciously thought about the parallel he was creating when he wrote Ghost Story is irrelevant, but in essence what Jim wrote was "It's a Wonderful Life - Harry Dresden." Think about it. If it's been a long time since you've seen the (overrated IMO) Christmas classic, or for some reason have never seen it, after Jimmy Stewart wishes he had never lived, an angel shows him what would have happened if that had been the case. Spoiler Alert, everything and everyone J-J-Jimmy cared about went to sh*t without him. That is (almost) exactly what happens in Ghost Story, except Harry made his wish with a bullet. (Also, Harry's attempted suicide wasn't going to change the past.) However, after Harry disappears into the depths of Lake Michigan, Murphy becomes a vigilante murderer, Molly is on the point of a nervous breakdown, Thomas was a total wreck and the magical community of Chicago was under siege by the Fomor. Harry's friends were barely hanging on and they had make deals with monsters and criminals in order to survive.
Ghost Story is not about Harry's journey in the novel. Almost everything that happened, Harry saving Mort from Corpsetaker and Evil Bob, Harry helping the teenage gang get away from the second rate sorcerer Aristedes, or even what Harry learned/remembered about Justin DuMorne and HWWB (Though I liked that part of the book and Harry's conversation with Lea in general.) is largely irrelevant to the major point of the story. Ghost Story is about Harry learning what he means to his friends and the world at large. Now Jim didn't hit his readers over the head with that message the way the movie did. Plus, Harry wakes up having failed to escape from Mab, so it's a much darker ending than the movie; as if Jimmy Stewart found out he still had to spend a couple of years in jail, but that doesn't change the larger meaning of the novel.
Come December, go watch "It's a Wonderful Life" and then read or listen to the audio version of "Ghost Story." You'll see exactly how right I am about this.