While researching the Arctic for a school project, ROBIN learns that something is melting the glaciers Ñ and it's not just global warming! With BATMAN’S help, ROBIN discovers that eco-terrorist RA#8217;S AL GHUL is behind the polar heat wave. To prevent an environmental disaster, the DYNAMIC DUO must brave the icy tundra and stop his evil plan.

HARLEY QUINN has captured ROBIN! But this crazy quack is only using the BOY WONDER as bait. Her true target is BATMAN, and she's left clues all over GOTHAM to lure him into her trap. If the DYNAMIC DUO can't escape her clutches, they'll both become HARLEY'S gift to her evil boyfriend, the JOKER.

It's Valentine's Day in GOTHAM, but not everyone is celebrating. VICTOR FRIES (aka MR. FREEZE) has never gotten over the death of his wife, Nora, and he's not about to let anyone enjoy this painful holiday. Only BATMAN can stop the cold-hearted criminal before VICTOR refrigerates the city!

The evil puppet SCARFACE and his wiseguys just pulled off one of the biggest heists in GOTHAM history. Unfortunately, there's a rat among the thieves, and the loose lips are helping BATMAN crack the case. Is the VENTRILOQUIST betraying his wooden creation to the DARK KNIGHT?

Many years after the death of his parents, BRUCE WAYNE comes face to face with their killer, JOE CHILL. While chasing down the cold-blooded crook, BRUCE recalls the story of his own past and how he became the world's greatest crime fighter . . . BATMAN.

When BATMAN learns about a school for aspiring villains, he sends ROBIN to find out who’s in charge. While undercover, the BOY WONDER discovers that the mysterious headmistress is none other than . . . CATWOMAN! The DYNAMIC DUO must find a way to take down this feline felon before her students graduate to full-time crooks.

GOTHAM'S greatest super-villains escape from ARKHAM ASYLUM, and BATMAN must quickly wrangle up the rebel rogues. When only one remains at large, the DARK KNIGHT gets an extra hand from his biggest, little fan Ñ the BAT-MITE, a mischievous imp from another dimension. Unfortunately, the RIDDLER isn't the easiest crook to catch. But if BAT-MITE can't crack the criminal cluemaster, he might end up hurting, instead of helping, his favorite hero.

Harley Quinn has gained Jonathan Crane’s trust, everything is going according to plan, and she is getting close to making her escape. But Black Mask and his gang are continuing to undermine the Magistrate and push Crane closer to the edge, where he will become the Scarecrow once more. Will Harley be able to defeat the Scarecrow and stop the Black Mask Gang? If she’s going to secure her freedom and save Gotham’s future, she’ll have to!

The Joker has created a virus that infects the latest videogame craze, and turns players into zombies--but in order to defeat him Batman must first discover where he is hiding with the kidnapped creator of the videogame.

Reeling from the effects of the worst Joker toxin attack ever, Batman is on the run through Gotham City, pursued by the dark shadows and voices that haunt his past and present! As The Joker’s plan materializes, the only person who can save Batman from the brink of true madness...is Harley Quinn?! Plus, who is the mysterious new figure known as Clownhunter?