Edmond Moore Hamilton was a popular author of science fiction stories and novels throughout the mid-twentieth century. Born in Youngstown, Ohio, he was raised there and in nearby New Castle, Pennsylvania. Something of a child prodigy, he graduated high school and started college (Westminster College, New Wilmington, Pennsylvania) at the age of 14--but washed out at 17. He was the Golden Age writer who worked on Batman, the Legion of Super-Heroes, and many sci-fi books.
The benefit of reading these decade books backwards is seeing the changes in tone almost out of the normal context of month by month developments. The biggest shift here is that for all the goofiness of the stories, they’re mostly not very reliant on gimmicky villains - more variations of the existing Batman tropes and mining the earlier noir tropes for something a bit more bizarre. You can definitely see why Grant Morrison mined a lot of this era for his run, because the weirdness feels more heightened than just silliness which often is the problem with the sixties when that tone has sort of settled because of the TV show