In this very holly-jolly issue of HARLEY QUINN, Harley and Red Tool go to visit Santa at the mall. They soon find out that Santa has been hospitalized, battling some inner demons that have rendered him comatose. The former Doctor Harleen Quinzel decides its up to her to save Christmas, volunteering to be sent into Santa’s brain!

Harley’s strange adventure into the mind of Santa is filled with scary monsters, reindeers, elves and bathing beauties and the fun doesn’t stop there. Will Harley be able to stop the demons trying to take over Santa’s brain? Will there be a Christmas this year? Find out more from writers Jimmy Palmiotti and Amanda Conner and artists Moritat, Joseph Michael Linsner, Bret Blevins, Inaki Miranda, and Dave Sharpe (letters) in the very festive HARLEY QUINN #10!