This is an interesting history but very broad and very shallow. I do enjoy histories like that but there was a lot of sacrificing of a deeper story in order to fit in more information. I really wish this had been two volumes of a hundred or so years each. More details would have made this book more compelling. Instead, it's just story, story, story with no deeper information. But a good book for that all the same.
Women have been detectives in fiction longer than they have IRL. In both streams, it took a long time for them to be more mainstream.
I do wish this had been more chronological as well. It jumped around a bit in time which got a bit confusing. The author marched through the fictional detectives up through the 1950s then jumped back to the nonfictional 1910s. With some fictional touches.