Yeah, I remember those...mostly written by Mort Goode IIRC.
I was about the same age as you, Bev, and was buying a ot of Columbia product. Those Inner Sleeve things did indeed do what they set out to do, which was to arouse curiosity and, if nothing more put the name of the artist or band in your head.
but of course, that was also a time when people were hungry for that type of thing.