Anatomy for Sculptors , specifically Understanding the Human Figure
The chapter on the head is worth the price of admission alone. Instead of abstract planes, he breaks the face down into manageable geometric shapes (the "Uldis" plane break down). For portrait sculptors, this section is a revelation. anatomy for sculptors.pdf
When you open a copy (or a high-quality scan), you immediately notice the difference. It is written by an artist for artists. Key features include: Anatomy for Sculptors , specifically Understanding the Human