Adkins books also pop up in thrift stores often. Bought the guide and recipe book for a friend both for less than 4$ recently. Have done adkins in the past i can't stick to it as high fat makes me sick and i eat little meat. It's working great for my friend. She is working with her doc who has modified it a bit to fit her health issues.
"Its not enough for the food to just be nutritious. It must also be delicious, or eating will feel like a punishment." Meg Galvin, Smartpeople Cookbook.