The National Sustainable Agriculture Network, also known as ATTRA, recently published an "Illustrated Guide to Sheep and Goats Production." The 20-page, basic and heavily graphic introduction to sheep and goat production discusses animal selection, feeding, breeding and young stock, equipment and handling, and marketing.
The guide is a great resource for youth and beginning shepherds.
http://attra.ncat.org/attra-pub/PDF/sheep_illus.pdf