Although it was only the second book of the series, I loved The President's Vampire by Christopher Farnsworth. The first is Blood Oath. Both are fueled by manic action, wry humor and some interesting use of history.
I am now well into I Don't Want To Kill You, the third installment in Dan Wells 'Serial Killer" trilogy and it is as good as the first two.
I did just pick up Depraved by Bryan Smith and if you haven't read him you are missing out on one the better new horror writers going IMO. Not for the squeamish however.
Scott
Jesus died for your sins, get your money's worth. Chad Daniels