just concerning Christopher West’s books. I think he has several books on the subject. Some are probably more suited for those already married or possible preparing to marry, while other are more suited for those who are single. They both address chastity, but the focus on some is more chastity before marriage while the others is mostly focused on chastity within marriage.
I do not know your age - but I have enjoyed the teen book probably more than his beginners book. As for the Good news about Sex and Marriage - my wife has that one and has not finished it - the Beginners book was a fairly easy read for me, but it so focused on changing how you think of your spouse I just don’t know if it would be as good for someone who is not married.