The Artist's Complete Guide to Facial Expression

The nuances of facial expressions can make or break an artwork's emotional impact. I'm curious what motivated the author to dedicate an entire guide to this aspect.

Some emotions seem tricky to capture convincingly, especially subtle ones. Did others struggle with specific expressions or feel confident across the board?

Having a detailed reference like this could really elevate character work, but I'm wondering if it encourages more expressive and dynamic portraits in practice.