Bill Finger

When Catwoman and Harley quarrel about who is the best burglar, they decide to settle it with a bet: who can steal the fabled Marble of Atlantis from the Gotham City Antiquities Gallery; but Catwoman cheats (in fact she already has the pearl), and Harley has to move fast to outwit her rival and win their bet.

Harley has her own reality TV show with a film crew following her around taping her doing fake robberies, and Batgirl finds herself as a suspicious and unwilling co-star--but when the film crew turns out to be a pack of thieves using Harley, the angry burglar teams up with the skeptical crime fighter to catch the villains.

Harley Quinn and Poison Ivy escape from Arkham Asylum and head back to Ivy's hideout; however, Harley proves to be a demanding roommate, so Ivy helps her take over a carnival and even grows her plant versions of Batman and Robin to boss around--but when Poison Ivy feels she has done enough and withdraws from the field, Harley discovers that being a criminal boss is a lot more difficult than she imagined.

"Its Halloween night in Gotham City, and the streets are full of monsters--real ones! Batman is battling a crime spree being carried out by the spookiest villains in town--Scarecrow, Clayface, Solomon Grundy, and Silver Banshee--who are all secretly working for the Joker. The evil mastermind wants to unleash a computer virus that will make all technology cackle and obey his every command! The Joker thinks hes in for a Halloween treat, but Batman has...

"Ancient curses are awoken and timeless secrets are revealed in this explosive sequel to the critically acclaimed blockbuster Batman: White Knight from writer/artist Sean Murphy! The Joker recruits Azrael to help him expose a shocking secret about the Wayne family's legacy--and run Gotham City into the ground! As Batman rushes to protect the city and his loved ones from danger, the mystery of his ancestry unravels and Batman begins to question everything...

"Batman teams up with the Scooby Doo gang when villains from both of their worlds unite to wreak havoc on the city."--www.imdb.com.