"How do they keep getting better?!"
First, the story was incredible. Second, Marsters is THE VOICE for Harry Dresden, period. Butcher's style is fluid, shifting beautifully from action to dialogue to narrative introspection. Jim, I started reading the Dresden Files when the very first one was published. I've re-read them many, many times and have gone back even to listen to them all on audible. Thank you for investing so much into this story, making it more and more incredible with each new installment.
You might disagree, but Cold Days reminds me some of the Roger Zelazny series (let's just go with the anthology titled "The Great Book of Amber".) Cold Days is perhaps an evolution of Urban Fantasy and flirts many times with the idea of a higher fantasy mentality where as "The Great Book of Amber" was more of a high fantasy flirting with concepts of urban fantasy.
Marsters has depth for Harry's feelings and those around him. Butcher developed very deep and intricate events around equal parts dialogue, action and narrative perspective. Marsters transitions between all the elements that drive a Dresden novel rather seamlessly. After hearing Marsters's stellar performance on Book 14 after such a disappointing absence for Book 13, it's clear that he is the voice of the Dresden Files.
Yes. I'm not talking about it though.
Cold Days is different than the previous 13, in that there is a lot less censorship. Lot of F-bombs and more graphic sexual descriptions. I don't say these are negatives. None of it was gratuitous, but they do stand out and they give this installment of the Dresden Files a different vibe. Book 14 was rated R to me, where the other 13 were more PG-13. Again, this is not a complaint. Some people like to know these things, so I figure it's a worthy additional comment.