not sure about a FAQ. You couldn't go far wrong with authors like Irving Chernev and Fred Reinfeld. They were two passionate amateur, American chess players who wrote instructional books about tactics, the opening, the endgame and so forth. I know a fair few very strong players who started off with Chernev's book "Logical Chess : Move by Move" and loved and learned from it.
Have a look at those titles by these authors.
I've been playing chess for many years since I was in elementary school. I beat the school chess champ in middle school. But on chess.com my rating has topped out at 1003 and then sank during a long bad spell to 850. I apparently haven't learned much in all these years of playing mediocre chess.
I'd like to get a better understanding of concepts of chess strategy. Is there a book or books that is generally accepted as helpful for someone at my rating.
I'm sure this question gets asked all the time. Is there a FAQ somewhere which keeps a list of current book recommendations? Would be nice to have people be able to vote on book recommendations so it can stay current without any one person having to manage it.