I am extremely picky when it comes to astrology books which is why I don’t usually recommend them. I find that a lot of personal bias comes into interpretations. For instance, how many times do we see that Scorpio is sex-crazed and possessive? ALL THE TIME. I try to keep it different and I look for authors who do the same.
But, I do have a few I would suggest:
You’re Every Sign by M.A. Phyllis Firak-Mitz
anything by Joanna Martine Woolfolk (best known for The Only Astrology Book You’ll Ever Need)