The best, comprehensive, from the ground-up intro to the basic concepts that I've come across. I wish I had started reading this last year when I first got started reading about astrology. Other 'cookbook' intro texts are okay, but something about this deep dive really hit a chord with me. The vulnerability of Leo. The value of the progressed sun. Mars representing fear. Jupiter representing 'fortunate' loss as much as gain. Sagittarian extremism. I love Steven Forrest's evolutionary approach to astrology, and his ability to break concepts down into relatable, memorable, content. Can't wait to read the other books in this series. Water is up next for me.