If you want a good book on dying fiber check them out on amazon. My favorite book is "Dying to Knit" by Elaine Eskesen. A color wheel is also a great tool for the dyer.
I usualy kettle dye my wool top, but had fun today dying my wool top with dye stock solution. My last post was how to make the dye stock solution. My most recent video shows you how to use that stock solution to dye wool top. Take a look and have fun!
How to dye wool top
You can use the same technique to dye wool yarn