When I was a kid, our elementary school used to have these book fairs, run by Scholastic book publishers. The company set up a display in the lobby outside the library, their various books for sale, and each spring I would spend a dollar or two on the latest edition of "All-Pro Baseball Stars." I guess the book fairs are still around, although the last edition of "All-Pro Baseball Stars" appears to be 1984.
It was a wonderful little paperback, 92 or 96 pages long, with two-page bios of the best players from the previous season, plus some statistics and standings and so on.