Book 50: Anno Dracula: The Bloody Red Baron by Kim Newman
Set in 1918, thirty years after the first Anno Dracula. Since his ousting as Prince Consort in Britain, Dracula has found a home and power with Kaiser Wilhelm in Germany. The war is raging and the German and Austria-Hungarian forces are set for their big offensive. In the skies above France, Allied fighter pilots are doing battle with a formidable force of enemy fliers, led by Manfred von Richthofen, the Bloody Red Baron.
The world Kim Newman has created is full of famous (and lesser known) literary vampires, along with well known historical figures, some of whom have also turned. His own creations are really very good, and both books I've read in the series so far are terrific reads. This edition has a brand new novella as well called Vampire Romance, featuring a significant gathering of vampire elders and a school girl who comes to realise that vampires are nothing like the romantic figures she reads about.