Start with high-confidence art reference books, then narrow by subgenre or adjacent topics.
The Human Figure
David K. Rubins
Classic Human Anatomy in Motion
Valerie L. Winslow
The Artist's Complete Guide to Facial Expression
Gary Faigin
Facial Expressions
Mark Simon
Classic Human Anatomy
Human Anatomy Made Amazingly Easy
Christopher Hart
Drawing People
Barbara Bradley
Mastering Composition
Ian Roberts
How to Draw Lifelike Portraits From Photographs - Revised
Lee Hammond
