Kristen Callihan is gearing up to release the third book in her Darkest London series, Winterblaze, which is set to hit shelves February 2013. We're big fans of the author's paranormal historical tales, and are anxious to get our hands on the third Ellis sister's story. In this video interview, the author catches new readers up on the series so far and she shares some details about the third book, which is a reunion story of a couple we've already seen happy together. Callihan calls Winterblaze "Mr. and Mrs. Smith with zombies," which certainly sounds intriguing! Plus, the author reveals what's in store for the fourth book in the series now that the three sisters have gotten their stories.