But wait! You forgot the Marshall Plan and Ian Ballantine!
Wherein Ian Ballantine had the really good idea of printing books in 25-cent paperback editions and selling them on US military bases all over the world after WWII. GIs came home, turned around, and asked where they could find those cheap books over here. And thus was born Penguin paperbacks, Pocket Books, and Ballantine Books. Not to mention Ace.
Re: How paperbacks came to be sold like magazines
Wherein Ian Ballantine had the really good idea of printing books in 25-cent paperback editions and selling them on US military bases all over the world after WWII. GIs came home, turned around, and asked where they could find those cheap books over here. And thus was born Penguin paperbacks, Pocket Books, and Ballantine Books. Not to mention Ace.