Shadow of Night since last year, and have had the audio book requested from the library since they bought it. It finally came in right before Thanksgiving, and I was able to listen to it while on the road for my holiday travels.
Seriously, people. I cried. It was that good.
If you have not read the first book in this series, A Discovery of Witches, do yourself a favor and get it from your library asap. This series is flawlessly crafted; a historical scholar, Ms. Harkness does not rehash the standard cliches and story lines of witches and vampires but sculpts a completely different world for them. Her ability to weave together a complicated and engaging tapestry of plots and sub plots is on par with Tolkien and Goodkind.
Be forewarned though - the next book in the series isn't out yet. So after you've indulged in the awesomeness of DoW and SoN, you'll be stuck in same place I am... that purgatory of waiting for the next amazing instalment in your new favorite series. I don't know whether to say you're welcome or I'm sorry!