I really don’t think there’s a subject that Giovanni Civardi can’t, won’t or shouldn’t turn his hand to. This is a wonderful collection of animal drawings that just burst with life, and he passes the horse test with flying colours (horses being one of the most difficult subjects and the easiest to get wrong). In fact the drawing on page 44 of a farrier shoeing a horse is about the most complex subject you can get.
Once again, this isn’t a full instruction manual, but rather a series of drawings and short demonstrations that lead by example. I’m not generally a fan of copying, though I know it works for a lot of people, but I really would recommend that you try to reproduce some of what’s here. It’ll be a tall order, but you’ll learn more by doing this than from almost anything else.