It’s important from a narrative standpoint in telling his own story of researching this; the point of these talks is much less about teaching kids the history of the co-creator of Batman than it is telling the story of the researcher and writer who put that history together. The point is to hopefully inspire a few kids to go down a similar path themselves.

It was presumed, since Bill Finger’s only child was a gay man who died thirty years ago, that no heir to his estate existed. The researcher discovering that Bill had a granddaughter would lose its impact without the knowledge that his only child was gay.

Finger died in obscurity in 1974, with artist Bob Kane credited as Batman’s only creator. Finger’s only child was a son, Fred Finger, who was gay and died in 1992 at age 43 of AIDS complications. Bill Finger was presumed to have no living heirs, meaning there was no one to press DC Comics to acknowledge Finger’s work.

But Nobleman discovered Fred Finger had a daughter, Athena Finger. That, he said, is a showcase moment of the presentation he estimates he has given 1,000 times at schools.

“It’s the biggest twist of the story, and it’s usually when I get the most gasps,” Nobleman said. “It’s just a totally record-scratch moment.”

Nobleman’s research helped push DC Comics into reaching a deal with Athena Finger in 2015 to acknowledge her grandfather and Kane as co-creators. That led to the documentary “Batman & Bill,” featuring Nobleman.