In Divas, Dames, and Daredevils: Lost Heroines of Golden Age Comics, Mike Madrid picks up where he left off with The Supergirls: Fashion, Feminism, Fantasy, and the History of Comic Book Heroines, but in reverse chronological order. In The Supergirls he told the stories of Wonder Woman, Sheena, Batwoman, Elektra, Storm and the She-Hulk, among others.
In Divas he has compiled and annotated the actual comics of the Golden Age (black and white in the print book and colorized in the e-book). Most of the heroines will be new names to readers--they were to me--Madame Strange, a two-fisted reporter; Lady Satan, a woman who lost everything to the Nazis, Black Venus, an exotic dancer, and Mother Hubbard, a senior citizen. There's also Betty Bates--Lady at Law, Maureen Marine, Marga the Panther Woman, Spider Queen and Spider Widow. These are Rosie the Riveter-type heroines who fly planes, punch out villains, and more, often while holding day jobs. And there's Pussy Katnip, a real catwoman in world of anthropomorphized animals. The characters in Divas are a far cry from the 1960s-era comics when women stand-alone comics were Superman's Girlfriend Lois Lane and Millie the Model, and the powers of ensemble heroines were things like invisibility. The comics in Divas are pre-Wertheim, pre-code so the stories are a bit grittier and the language reflects the sensibilities and stereotypes of the times.
The comics of the 1940s are a source for all manner of interesting observations--on language, society, narrative and design, mythic origins, readership and women's history. The art is rough but avoids the exaggerated proportions of later work. If I were a comic historian, this would be a treasure trove of research ideas.