Leviticus is composed of two basic genres Narrative History and Law. It was written by Moses about 1445-1444 B.C. The setting of Leviticus mainly appears to take place at Mt. Sinai. The key personalities of Leviticus include Moses, Aaron, Nadab, Abihu Eleazar, and Ithamar.
It was written to draw the Israelites to the understanding of the infinite holiness of God, and that He desires them to act in a holy manner toward Himself. In doing this, God gives them many instructions to carry out. It describes Moses giving procedural instructions for the Israelites, especially to the Levitical priests, about how they are to carry out offerings, ceremonies, and celebrations. The word “Holy” is mentioned more times in Leviticus, than any other book in the Bible.