Before venturing off on her own New 52 adventure, DC Comics released Harley Quinn #1. This “100-page spectacular” is meant to act as a greatest hits of sorts for the Joker’s on-again-off-again lover. Within this collection you’ll get Batman: Harley Quinn #1, Joker’s Asylum II: Harley Quinn #1, and stories from Batman: Gotham Knights #14, Countdown #10, Batman Gotham Knights #30 and Batman Black and White #1.
Having made waves as part of The New 52 edition of the Suicide Squad, Harley Quinn finally gets her own series. As a story that sits outside of the Suicide Squad continuity, a former patient from Arkham Asylum has passed away and given her his apartment building. After the Joker blows up all of her stuff, she heads off to take claim to hew new digs and rebuild her life. Through Steff, I’ve been able to read through Harley Quinn #0-3.