This is my first human anatomy sculpture made on zbrush. My intention is to make a character art portfolio, starting with an anatomy project, understanding its features and then creating some game characters with different tematics.
The one book I already linked, "Atlas of Human Anatomy For the Artist" is really good. I also like ImagineFX's special series on anatomy. myfavouritemagazines.co.uk/ImagineFX-Anatomy/
Don't constrain yourself to ZBrush anatomy. What you're going to be looking for is just anatomy drawing as a whole, or sculpting anatomy In that regard, this may be a starting point http://www.anatomy4sculptors.com/