Out of everything that happened in the book, the thing that has me most curious is
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this stuff about Mac. What is he? The book strongly hints he might be an outsider, maybe there are good outsiders?

Also, as regards Faerie
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does this mean the summer and winter courts, or even all of faerie itself was created for the purpose of defending the Dresdenverse (is there an official name for this?)? Were all faeries originally mortal? How did this system come about anyways?

Finally, as regards Titania
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she goes on about how Mab is all rationality while she is all emotion, and then goes to prove Spock right by basically causing all the problems of this book because of the way she treats Lily. Mab may be a psychotic bitch, but at this point it seems that she has done more than anyone else to protect the Dresdenverse. Seriously, Titania is pretty stupid.