Thanks; I actually do have an anatomy book around here somewhere, but I... exaggerate parts of the body on purpose. Women will always have legs about a half a head longer than guys is one of the things I always do, for example. Also, as you probably noticed, I tend to draw a quasi-superhero type where the guys are ripped and the women are hourglass shaped. The thing I know I need the most work on is muscle structure. This book actually has some good bone and muscle structure stuff in it (which I could have really used on my Cyrene picture)... it'll help for the current pic I'm on.
Of course, my drawings will never be too believable... (heh)