Which book summarizes God's guidance and laws at Mount Sinai?

The book that summarizes God's guidance and laws given at Mount Sinai is Leviticus. This book serves as a key text within the Torah, detailing the laws, rituals, and religious practices that the Israelites were to follow. It specifically focuses on the laws regarding holiness, sacrifices, and the priesthood, emphasizing how the Israelites could maintain a covenant relationship with God.

While Genesis covers the creation and the early history of humanity, and Exodus recounts the story of the Israelites' liberation from Egypt and includes the initial giving of the Ten Commandments, it is Leviticus that expands on those laws and provides the detailed regulations for worship and daily living. Deuteronomy reiterates earlier laws and includes new statutes for life in the Promised Land, but it doesn't primarily serve as the initial source of guidance given at Mount Sinai. Therefore, Leviticus is the correct answer as it specifically addresses the guidelines provided during that pivotal moment.