In my opinion, one of the best sources (if you can find it) is Poultry Breeding and Genetics by Crawford. It is more than 1,100 pages jam packed with information and a review of the existing literature and research. I have used it mostly for waterfowl genetics, but it covers all types of poultry. It is very hard to find though and rather expensive.
The book Poultry Breeding & Genetics has been out of print for many years it is not available new, and is rarely seen secondhand.
Genetics of Chicken Colours - The Basics is also out of print, the Serama Council of North America may still have a copy or two. It will not be re-printed but will be avaiable on , a more expensive, Print to Order basis from [email protected]
David Hancox Co-author