I've not seen the book that Lindsay suggested, but I have heard some good things about it. One from several years ago, a predecesor and referenced in the Reeder book is Fred Jeffery's "Bantam Chickens". This book was listed for sale by the ABA and it's currently out of print. I think the ABA is working toward a new printing. I have a couple of copies of this one if anyone is interested in taking a look. It is valuable for the basic genetics of colors, breeds and breeders that discuss the methods they've used to create and correct various colors. It has a half dozen illustrations showing the color families and how they are modified using additional color genes.