Tonal Values: How to See Them, How to Paint Them

Artistic Secrets to Painting Tonal Values

Color Theory: An essential guide to color-from basic principles to practical applications (Artist's Library)

Daily Painting: Paint Small and Often To Become a More Creative, Productive, and Successful Artist

Color Wheel 3505 Gray Scale and Value Finder

Mastering Composition: Techniques and Principles to Dramatically Improve Your Painting (Mastering (North Light Books))

Color and Value (Keys to Painting)

Dramatize Your Paintings With Tonal Value (Elements of Painting)

The Simple Secret to Better Painting: How to Immediately Improve Your Work with the One Rule of Composition

Drawing Realistic Textures in Pencil