The best-selling Rebirth series by Hope Larson returns in Batgirl: Vol. 4, a chilling metropolitan mystery for the ages! It's the holiday season in Burnside, and everyone is getting into the spirit...including Harley Quinn and the Penguin! After the maid of mischief infects Barbara Gordon's company party with a killer virus, Batgirl must embark on a wild-goose chase around the city to find a cure. Meanwhile, a massive blizzard hits Gotham City without warning, and Batgirl must brave the bitter cold to discover the truth behind the storm. When the storm finally clears, Batgirl begins a thorough investigation into a string of attacks targeted toward women in Burnside. But she's not the only one searching. Can a father-daughter duo put their differences aside long enough to crack the case? New York Times best-selling creators Hope Larson (A Wrinkle in Time) and Sami Basri (American Vampire) present Batgirl Vol. 4. Collects issues #18-25.