Rampages by Lew Bradley. Period.
I've read most of the books mentioned above. Rampages is THE Holy Bible of sheep hunting. I heard about this book, and then called Lew and went over to visit him last summer before my first sheep hunt. His wife made some fresh baked chocolate chip cookies and Lew regaled me for hours with stories about sheep hunting. The man has over 40 sheep mounted in his house. His books took over a decade to complete and are over 1,000 pages of information, stories, statistics, etc. No apologies to the previous authors, but Lew's sheep anthology is beyond a PhD in sheep hunting and biology. Very simply, the man is a living legend in the sheep hunting world. If you want to know about sheep hunting, buy his books.