Tonal values: How to see them, how to paint them

Artistic Secrets to Painting Tonal Values

Dramatize Your Paintings With Tonal Value (Elements of Painting)

Carlson's Guide to Landscape Painting

The Color Wheel Artist's View Catcher

The Evolving Picture: How to Manipulate Your Paints Until you Get a Painting You Like

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

Planning Your Paintings Step-By-Step

Fill Your Oil Paintings with Light & Color

The Elements of Landscape Oil Painting: Techniques for Rendering Sky, Terrain, Trees, and Water