The Book of Leviticus, the third book of the Bible, primarily deals with the laws and regulations that governed the religious and moral life of the Israelites. It is structured around the theme of holiness, outlining rituals, sacrifices, and purity codes necessary for maintaining a sacred relationship between God and His people. Leviticus emphasizes the importance of obedience to God’s commandments, particularly in matters of worship, ethics, and social justice.