Because you like books where people wear cardigans? In that case, you'll love Shambling Guide to New York by Mur Lafferty. IIRC, the protagonist wears two different cardigans! Or because McGuire answered my question? Because she responded to a LJ comment I left her too, I am becoming quite insufferable.

(Ps. I did like the Lafferty, and think you probably will too because I can't imagine why you wouldn't, it's got zombies and everything and she describes herself as 'such a Douglas Adams fangirl.)