The 3 essential Harley Quinn crossovers:Death of the Family(confrontation with the Joker, emancipation),Joker War(pivotal role in the liberation of Gotham) andHeroes in Crisis(Harley facing the collective trauma of the heroes).
Harley Quinn has come an extraordinary journey since her creation in 1992 in Batman: The Animated Series. From Joker's sidekick to independent anti-heroine, her evolution can be seen through the Gotham crossovers which gradually emancipated her. Each major Batman/Gotham event has redefined his relationship with the Joker and his place in the DC universe.
For a collector, Harley represents a double interest: the massive popularity of the character maintains a strong demand for key issues, and its journey through crossovers producesmemorable collectible moments. This guide identifies the events where Harley has a significant role and the numbers to prioritize.
Death of the Family (2012-2013) — The break with the Joker
Scott Snyder orchestrates the return of the Joker (who had his face torn off a year earlier) in an event that crosses all Batman titles. Harley Quinn plays a central emotional role: confronted by the Joker who considers her a disposable toy, she must choose between submission and emancipation. Suicide Squad #14-15 (New 52) are the most important Harley tie-ins of this event.
Batman #13-17 form the heart of the event and are major key issues (Batman #17 conclusion: €20-50 in 9.8). For theharley quinn key numbers, these tie-ins mark a turning point in the character.
Joker War (2020) — Harley versus her past
James Tynion IV places Harley in a pivotal role: she is the one who helps Batman get back on his feet when the Joker takes control of the Wayne fortune and invades Gotham.Batman #95-100form the heart of the event, and Harley Quinn appears in a crucial side arc in her own title. Batman #100 (conclusion) is the main key issue, rated €15-40 in 9.8.
The most sought-after Harley Quinn tie-in is Harley Quinn #75 (last issue of the series), directly related to Joker War.
Heroes in Crisis (2018-2019) — Trauma in full light
Tom King places Harley at the center of a mystery thriller in Sanctuary. Wrongly accused of the massacre, Harley must prove her innocence while confronting her own demons. The 9-issue event presents her as a complex survivor rather than just a crazy person. Heroes in Crisis #1 (first appearance of Sanctuary) trades between €15 and €35 in 9.8.
Gotham City Sirens (2009-2011) — The Female Alliance
Not a crossover strictly speaking but a series of 26 issues written by Paul Dini which unites Harley Quinn, Catwoman and Poison Ivy. The series is part of post-Batman RIP continuity and explores the dynamics between the three anti-heroines of Gotham. #1 is a modern key issue (€30-80 in 9.8 CGC) boosted by recurring rumors of a film adaptation.
War of Jokes and Riddles (2017) — Harley caught in the crossfire
Tom King narrates a flashback of the war between the Joker and the Riddler for control of Gotham (Batman #25-32). Harley appears there as a soldier in the Joker camp, recalling his toxic past. Batman #25 (first chapter) is an accessible key issue, between €10 and €25 in 9.8.
Harley Values Summary
Gotham City Sirens #1: €30-80 (9.8). Batman #13 (Death of the Family): €25-60. Heroes in Crisis #1: €15-35. Batman #100 (Joker War): €15-40. Harley's rating remains driven by the character's popularity outside of comics.
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