Dark and Stormy Knights edited by P.N. Elrod

This collection of nine short stories is united by its protagonists: they're all somewhat morally ambiguous protectors of the weak (by choice or by compulsion). The Jim Butcher story ("Even Hand") features John Marcone instead of Harry Dresden and was really excellent. I also loved "Even a Rabbit Will Bite" by Rachel Caine about the last dragonslayer in an age that doesn't really need her anymore. "Rookwood and Mrs. King" by Lillith Saintcrow, "Dark Lady" by P.N. Elrod, "The Beacon" by Shannon Butcher, and "A Questionable Client" by Ilona Andrews were all intriguing--I'd especially be interested in the series associated with Elrod's and Andrews's stories. Some of the other stories (apparently part of stories) were really opaque: the magical systems, worlds, and rules were weird and not clearly explained and the characters had lots of missing backstory.