I know we have a lot of information Harry doesn't, but it really astounds me for a guy who is meant to be a big knowledge seeker (as a Wizard) that Harry does so little. He spends so much time fighting, which is interesting, but at some point wouldn't you make a list of all the weird stuff you might need to know?
For example, one of the biggest mysteries is Harry's mother. Who she was, what she did, what she was a part of etc. Harry has been told repeatedly of her dangerous activity, her disregard of the council, her anarchist/activist nature and that she was involved with some really bad people (Lord Raith, Justin, Lea, Nicodemus, Ariana etc). But he has done almost no research into this. Why not call up Lea and say "Hey I need to know about my mother etc?"
And there are many more: What is a Starborn? Why do I have power over Outsiders? Maybe ask Mab a bit more about the Outsiders. He certainly should be having a larger chat with the Gatekeeper about all of that. Definitely some research into Kemmler would likely prove fruitful. What about asking Ebenezer about Drakul, Kincaid, how the supernatural nations hitmen work? And he really needs to read Merlin's journals, and maybe all those other ones. Which likely for plot reasons will only happen when Eb dies. How about the really weird mystic anomaly in Ghost Story where the "Shade" of Dresden is able to appear on Holy Ground, when others cannot e.g. Kravos. I think that the current theory is because Harry was not actually a "shade" but part "soul" as well. But still never explicitly answered.
I do understand that all will be revealed in time, plots need to form there own way. But surely you would ask more of these questions as it seems to affect just about everything you do?
Anyone got any other areas Harry should be researching?