Milgrom was considered the leading scholar on the book of Leviticus and he provides many, many insights on things that would have gone right over my head if he had not clued me in. He does assume a Priestly writer and a Holiness writer (P and H). Being quite conservative in biblical matters, this seemed mostly unnecessary to me. I also disagree with his treatment of several of the laws (notably homosexuality). Those things aside, this is an important work to be studied by any serious student of Leviticus.