I remember those 2 books (if it's the ones I'm thinking of). I wish I still had them.My parents brought me a 3x3x3 Rubik's brand cube in 1981 and two solution books to solve it.
Remember that there was no internet (at least to us civilian users) back then.
But it took me until May 2009 to actually solve one. I brought one of the two book I was given in 1981 on Ebay and used that to solve it.