1. The Big Book of Realistic Drawing Secrets: Easy Techniques for drawing people, animals, flowers and nature (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
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2. Portraits of Courage: A Commander in Chief's Tribute to America's Warriors (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10

3. Portrait Painting Atelier: Old Master Techniques and Contemporary Applications (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10

4. The Art of Drawing & Painting Portraits: Create realistic heads, faces & features in pencil, pastel, watercolor, oil & acrylic (Collector's Series) (Click Link to Check Price on Amazon)
Editor's Rating : 9.1 out of 10
Keep your techniques sharp with this amazing book

5. 1,500 Color Mixing Recipes for Oil, Acrylic & Watercolor: Achieve precise color when painting landscapes, portraits, still lifes, and more (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10