Start with high-confidence life drawing 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 Figure Drawing
Anthony Ryder
The Artist's Complete Guide to Facial Expression
Gary Faigin
Facial Expressions
Mark Simon
Classic Human Anatomy
Drawing People
Barbara Bradley
The Artist's Guide to Drawing Realistic Animals
Doug Lindstrand