When a prominent Gotham City doctor is found dead with Joker toxin in his veins, all the clues point to Harley. The Dark Knight is on the case, and to clear her name, Harley will have to convince Batman of her innocence then team up with the Caped Crusader to find the real baddie.

But this misadventure is more than just typical Quinn shenanigans: it's the first step in a cosmic-powered opportunity of a lifetime Turns out, the godlike Lords of Chaos and Order are seeking a new agent, and Harley's a contender. Now, all that stand in the way of her becoming a demigod of Chaos (naturally) and Order (is that a typo?) are a couple of lousy trials. But before she can prove her worth to the immortals, she'll have to prove it to Batman. If he can't believe she's changed, will the first test be her last?

Plus, the Three Witches bug Harley with an unexpected metamorphosis, a holiday reunion brings bad tidings, and more in Harley Quinn Vol. 3: The Trials of Harley Quinn, from writer Sam Humphries (Dial H for Hero) and artists John Timms (Harley Quinn), Otto Schmidt (Green Arrow), and Sami Basri (Power Girl)

Collects issues #55 and #57-63.