It's the fourth book in Rachel Caine's Morganville Vampire series. The first three have been great reads and if the cover art is any indication, this one looks good too. Word Nerd may be making an emergency trip to Borders after work today to pick herself up a copy.
As if that wasn't enough, next Thursday, this one comes out.
Since that picture is small, it's "Kushiel's Mercy" the sixth of Jacqueline Carey's Kushiel books, a top-notch fantasy series.
Too many good books. Not enough hours in the day.