Sherlock Holmes and the Vampires of London (Sherlock Holmes et les Vampires de Londres #1-2)

Sherlock Holmes died fighting Professor Moriarty in the Reichenbach Falls. At least, that's what the press claims. However, Holmes is alive and well and taking advantage of his presumed death to travel the globe. Unfortunately, Holmes's plans are thwarted when a plague of vampirism haunts Britain.
This book collects Sherlock Holmes and the Vampires of London Volumes 1 and 2, originally created by French publisher Soleil.