From the Facebook event:

"We are celebrating cold-blooded killers during the icy cold month of January! Join us for a darkly delightful discussion with author Tori Telfer, whose new book "Lady Killers" investigates female serial killers and their crimes through the ages. Though largely forgotten by history, female serial killers such as Erzsébet Báthory, Nannie Doss, Mary Ann Cotton, and Darya Nikolayevna Saltykova rival their male counterparts in cunning, cruelty, and appetite for destruction. 
Copies of the book will be available for sale/signing.
Light refreshments provided; BYOB encouraged."