Devil at Midnight by Emma Holly

"For years, mercenary captain Christian Durand has done everything he can to protect his men. When a beautiful ghost appears to offer comfort, he assumes the strain has finally pushed him over the edge. All he knows for certain is that this woman tugs at both his heart and desires. But now that a vampire queen has set her immortal sights on Christian, he must choose between his darker urges and a powerful love that spans centuries." (from Amazon.com)

Paperback Info: ISBN 0425237818, Berkley, November 2010