What book did josiah read to his people?

Josiah read the Book of the Law, which is often identified as a portion of the biblical text found in Deuteronomy, to his people. This event took place during a significant religious reform in the Kingdom of Judah, as described in 2 Kings 22-23. The reading of the book led to a renewed commitment to the covenant between God and the people, resulting in various reforms aimed at restoring true worship.