I have a book which is great and i have learnt alot of things.
Has lots of pictures in so people can understand it better
It is called "Good Judgement" by Peggy Grayson i got mine from pets at home but you could also go to our dogs stand and ask them not sure if you are going tho.
Very good book and i would reccommend it to those who want to go into judging but is still good for those who just want to learn about the bones too
hth