The book isn't specifically written for women. (In fact, the second review that showed up when I went to the page -- and that gives the book five stars -- is written by somebody named "Timothy.")
It's been so long since I read the book that I can't remember all of the specifics, of course, but based on what I can recall, the author tells how drugs distorted her perception of good and evil. However, I also believe that she also makes parallels about other ways one can become "desensitized" to where things seem less evil, which is the first step toward going from rejecting something to accepting. I often cite how far films have come since Clark Gable as Rhett Butler first uttered "damn" in a film. Probably a better example would be to compare how when I was in HS in the 1960s, "good girls" didn't even say "sex" out loud; we'd lower our voices and spell out the word ("s-e-x"). Now we have the f-word used openly in music meant for preteens and teenagers, and (thanks to the impeached forner president) the names of sex acts said openly on newscasts.
IOW, the book may not necessarily speak directly to what your son is grappling with, but I believe it'd provide a step toward that understanding. (That *is* part of the problem. Good people will always have trouble understanding why evil people act the ways they do; that evil behavior is so far removed from how good people operate. But, hate the sins but love the sinners doesn't mean that we refuse to accept that sometimes sinners need to be brought to justice. That justice is our way of overturning the money-changer's tables at the temple, imo.)