Michael Genhart, PhD, is a licensed clinical psychologist in private practice in San Francisco and Mill Valley, California. He lives with his family in Marin County.

Steve Mack has been drawing for as long as he can remember. His first lessons in art were taught to him by watching his grandfather do paint-by-numbers at the summer cottage. Later, he took every drawing class he could find at the local community center and spent every hour of math class sharpening his drawing skills. After graduating from college as a Visual Communications know-it-all, he instead turned from graphic design back to his roots as an illustrator. Steve started freelancing in the year 2000 and has had a steady climb upwards since that time. Steve now lives and illustrates on a small farm with his wife and two young children.