Nehemia Gordon provides insight on the laws concerning niddah found in Leviticus 15, 18, and 20. Niddah refers to a menstruating woman or a woman who has not become ritually clean following her period. Gordon defines the different types of niddah and the reasons for the prohibition against sexual intercourse with a niddah. He explains how rabbinical tradition combined all the different types and thereby imposed unnecessary burdens on women and families. He gets to the heart of the matter by answering the questions: Are separate beds and chairs what truly separate the righteous from the unrighteous? And whose house is really at stake here? Gordon also gives insight into first century ritual cleansing based on archeology and an example from the life of Paul of Tarsus.