All I know is it's the best book out there on Milking, Health of cows, Birthing of calves, Nutrition, you name it she,(MaryJane) covers it. I will have mine wore out before the year is up, that's how much I rely on it. It is the absolute best book out there to help anyone wanting to have a milk cow and become a milkmaid/man. It gets high honors in my opinion. The recipes and other tips are an added bonus for sure. Cheesemaking, on and on. She covers it all. Wonderful book, invaluable to me!