Barbara Gordon was one of the most important female characters in the batman series. She appeared frequently in many works. Here are some of Barbara Gordon's works in the series: 1. The Dark Knight: Knightfall 2. The Dark Knight 3. The Dark Knight Rises 4. Comic book adaptation of The Dark Knight: Knightfall, The Dark Knight: The Origins of DCcomics 5. The Dark Knight Rises, a comic adaptation of The Dark Knight 6. The Dark Knight animated series (the plot of the animated series is different from that of the manga) In addition, Barbara Gordon also appeared in many other characters in the series, such as The City of Gotham and The Dark Knight: Superman Beyond.