Burne Hogarth's Dynamic Anatomy and Dynamic Figure Drawing are readily available; they're where I learned most of what I know about anatomy.

Of course we want to see! It seems like so talented many artists are giving up drawing muscular women recently, so it's good to that someone new is giving it a try.

I've collected quite a few anatomy books over the years, but the one I keep coming back to is "Anatomy - A Complete Guide for Artists" by Joseph Sheppard. It has these really useful schematic pictures which show the muscles being progressively added to the underlying skeletal structure, for both different angles and different muscles being flexed. They really help you to visualize how the muscles fit together and how they interact to move the limbs of the body. Also, the artist uses quite muscular models for both the women and the men.

I also recently discovered the pay sites http://www.3d.sk and http://www.female-anatomy-for-artist.com. One of the models they use is a female bodybuilder, and the reference pictures are from every angle and not just the typical bodybuilder poses.

Good luck with your endeavor.