This is a video of John Scarne performing card manipulations. Very impressive stuff. I wanted to embed the video, but it didn’t seem to want to be embedded.
I remember reading a book titled “How to Cheat at Cards” when I was in high school. I remember it as a book, but the only references to that title I find online are to a chapter of the book “Scarne on Cards” (which I own), and to that chapter’s reprinting as a magazine article in Life magazine in 1949.
I may be misremembering (it wouldn’t be the first time), but because Scarne made an effort to educate servicemen to the tricks employed by card sharps during World War II, and it was a military library I read it at, it’s possible that it was a pamphlet reprinting the chapter that was put out specifically for the military. I own a couple of LPs that were sold only through the military BX/PX system, so it’s not an unreasonable assumption.