As for a PDF download of Henry Yan's figure drawing material, there are a few possibilities:
If you are looking for the "full blog post" content often associated with this book, several respected art blogs provide deep dives into his techniques: henry yan figure drawing pdf download
The final third of the book focuses on the face and extremities—often the downfall of self-taught artists. Yan demonstrates how to draw a nose using three planes and how to construct a hand from the palm wedge. As for a PDF download of Henry Yan's
: Roughly 20 demonstrations ranging from quick gesture sketches to long, detailed studies. henry yan figure drawing pdf download