The Adventure of the Spectred Bat (New Sherlock Holmes Mysteries Book 10)

A very pregnant young woman walks home under a full moon. She is attacked by a bat and bitten on her breast. She dies in the arms of her sister. At the next full moon, the sister is also attacked. She escapes and flees to Baker Street, begging Sherlock Holmes to protect her. If you like stories about vampires, and Sherlock Holmes, this is for you.