Harley Quinn: Vengeance Unlimited

In 2014, DC Comics released this single-issue story by writer A. J. Lieberman and artist Mike Huddleston, offering a darkly introspective look at Harley Quinn as she pursues a personal vendetta. Eschewing her usual chaotic humor, the book delves into her psyche and her twisted relationship with violence, framed by Huddleston's moody, expressionistic art. A standalone tale from the New 52 era, it stands as a focused character study for fans interested in a more somber side of the Clown Princess of Crime.