Jim Butcher's The Dresden Files: War Cry #4

A surprise ally has appeared, offering Harry and his beleaguered team salvation. Unfortunately, Baron Bravosa and his army of Red Court vampires have an ace up their collective sleeve--one that puts Dresden and co. at an even more severe disadvantage. With hours still to go till sunrise, Harry will be forced to make a decision that could win them the battle -- but lose the war…

Characters: Harry Dresden, Thomas Raith