Question: Is there something that happened in an earlier book in the series, that you kind of wish now that you hadn't done? Something that you kind of set in place.

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No. I think all things considered, I feel like I'd be a little bit ungrateful at this point if I said, "Oh, the early series was just so messed up!" Because it seems to have worked out. The only thing I regret is that people have to start reading the series with the book that I knew the least about writing a good book when I wrote it. It's okay, you won't hurt my feelings by acknowledging that there was a learning curve there, going on in the early series. I wrote that when I was 26 and knew very little about the actual art of writing a good story. And now it's a much different process for me.


Source: Dragon Con 2014 - An Hour with Jim Butcher Panel (Timestamp: 1m18s)
Date: August 29, 2014