Vampire attacks have ravaged St. Petersburg and gutted the Russian royal family. An ancient castle has reappeared on a German mountaintop, and a coven of demon worshippers has just resurrected an entity known as the Death Witch in the body of a teenage girl. Germany’s Kaiser Wilhelm II is desperately seeking a small bottle of blood—so frantically, in fact, that he was willing to orchestrate the assassination of Archduke Franz Ferdinand rather than let his rival find it before he did. (The ghost of the archduke now haunts the Kaiser as an act of posthumous revenge.) The blood belongs to none other than the famous medieval warlock Vlad Drăculea, and the Kaiser believes it will grant immortality to him and his mistress. The bottle is currently in the possession of Vlad’s younger brother, Radu cel Frumos, an immortal witch hunter who has survived the intervening centuries using a series of false identities, the latest of which is the Sommelier. The only thing standing in the way of the Kaiser and the domination of Europe by a cabal of diabolical forces are the Russian vampire hunters Prince Felix Yusupov and Rurik Kozlov, who recently helped prevent great devastation in Russia. A clash is coming, and it will happen in the vicinity of the French city of Arras. Gage excels at unsettling readers through his sharp, startling imagery: “The sound of animal hooves and snorting filled the room, followed by a loud bang. Felix looked up and was astonished to see the officer being gored against the wall by a large boar with sharp tusks. The man looked panicked and surprised as he slid down the wall, finally falling unconscious.” The story takes a while to get rolling, leading with a lot of complex mythology that at times feels weighty or silly. But once things begin in earnest, the tale proves an immersive and monster-filled epic. It turns out the only thing scarier than the vampires and demons is World War I itself.