Harley is set to begin her new life, but she needs a job first. Enter the Coney Island Roller Derby! It's game time as Harley sets out to destroy her competition—literally.

In this second HARLEY QUINN collection, Harley gets fed up with crime and decides to switch sides — much to the chagrin of Batman and company. Then, with her gang threatening to mutiny, Harley must whip them into shape while battling Killer Croc. Collects HARLEY QUINN #8-13 and HARLEY QUINN: OUR WORLDS AT WAR #1.

"HARLEY LOVES JOKER" flashback tale that ran as a backup in HARLEY QUINN last year! As far as The Joker's concerned, the new headquarters Harley built for them is absolutely perfect...but only she knows the whole place is rigged to come crashing down around them—and she doesn't know how to stop it!

After liberating New York City from her now-feral Gang of Harleys, poor Harley wants nothing more than to slip back into retirement in her coastal (and heavily guarded) paradise. But the Laughing Boys gang has another idea—they'll follow her to the ends of the Earth, to drag her back to their leader! It can't actually be...him! Right?! He couldn't possibly still be alive, could he? After all...Harley killed him herself with her bare hands! Should she turn to President Power Girl for help? Or flee to the 51st state, Atlantis? Step into an insane vision of a future DC Universe we all better hope we don't live to see! Collects the five-issue miniseries and HARLEY QUINN #42!

When a new hospital collapses into a sinkhole in the middle of Gotham City, Harley Quinn tries to convince Huntress and Black Canary to investigate. But can the Birds of Prey really trust the Clown Princess of Crime? Or do Harley's true allegiances lie elsewhere?

The creative team that transformed Harley Quinn forever returns to shake up her world once more-and this time, the gloves are off! Harley Quinn has avoided Gotham City ever since she broke up with The Joker and found a home in Coney Island. But when she gets an offer she can't refuse, she has no choice but to slip back into the city as quietly as she can, hoping to be gone before anyone-especially her ex-learns she's been there. But for Harley, "as quietly as she can" is plenty loud...and before she can say "Holee bounty hunters, Batman," The Joker's sicced every super-villain in the city on her pretty ombré head-and the only team tough enough (or crazy enough) to come to her defense is the Birds of Prey…if they can put up with her. Collects Harley Quinn & the Birds of Prey #1-4.

When Harley discovers that Ivy is being held captive in Arkham Asylum, she decides to help her out-by breaking in!

If you thought you'd seen all the mayhem Harley was capable of unleashing with the help of an all-powerful genie and infinite wishes...well, we wish you'd known better!

With just five dollars and a knapsack to her name, 15-year-old Harleen Quinzel is sent to live in Gotham City. She's not worried, though-she's battled a lot of hard situations as a kid, and knows her determination and outspokenness will carry her through life in the most dangerous city in the world. And when Gotham's finest drag queen, Mama, takes her in, it seems like Harley has finally found a place to grow into her most "true true" with new best friend Ivy at Gotham High. But when Mama's drag cabaret becomes the next victim in the wave of gentrification that's taking over the neighborhood, Harley's fortune takes another turn. Now Harleen is mad. In turning her anger into action, she is faced with two choices: join activist Ivy, who's campaigning to make the neighborhood a better place to live, or team up with her anarchist friend Joker, who plans to take down Gotham one corporation at a time. From Eisner Award and Caldecott Honor-winning author Mariko Tamaki (This One Summer) and Eisner Award-nominated artist Steve Pugh comes a coming-of-age story about choices, consequences, and how a weird kid from Gotham goes about defining her world for herself.

In a new direction for the series, Harley attempts to juggle being a full-time psychiatrist with her own criminal activities. But the unbalanced people she has to treat are keeping her very busy-and she's wanted for the murder of a police officer. Then, Harley gains powers beyond those of normal humans thanks to Poison Ivy's experiments. But every gift has its price, and now Harley faces the consequences. Plus, Harley signs on for a mercenary gig to hunt down a guy on the lam and retrieve an unnamed object of limitless value for him. Collects HARLEY QUINN #26-38.