Ever wondered what are the subtle differences in horses coat colors?  This 127-page paperback, 2001 Mountain Press Edition "The Color of Horses" The Scientific and Authoritative Identification of the Color of the Horse" by Ben K. Green.  Illustrated by Doral Dickinson.  Not only do these pages have full page color pictures of the horses, but part of the description shows the physiological hair and skin reasons why a bay and dun are different.  Must read for any horse lover!