I would recommend Scott Spencer's anatomy book too. [ame="http://www.amazon.com/ZBrush-Digital-Sculpting-Human-Anatomy/dp/0470450266"]ZBrush Digital Sculpting Human Anatomy: Scott Spencer: 9780470450260: Amazon.com: Books[/ame]
Yes, I have the ebook version.. I wish I would've bought the hard copy as the digital version doesn't have the dvd that comes with it. But as for my sculpt here, any critics?
As well as what others have said about the Loomis books, I'd also recommend picking up the book ZBrush: Sculpting digital Anatomy by Scott Spencer, if you don't already have it. Really helped me with my character sculpting.