Fundamentals of Drawing: Facial Anatomy Essentials
Fundamentals of Drawing: Facial Anatomy Essentials, available at Free
Pencil Drawing Mastery: Tonality, Shading & Hatching Skills
Pencil Drawing Mastery: Tonality, Shading & Hatching Skills, available at Free
Beginner's Guide to Figure Drawing
Beginner's Guide to Figure Drawing, available at Free