Every room in the Old Testament, from the lavish chamber of Eden to the sacred cubicle of the Holy of Holies, is opened by a single key. That key is the Messiah, the fulness and fulfillment of God's word. These chapters will travel deep into the Old Testament world to reveal how creation, the exodus, the temple, the psalms, and much more bear witness to Christ and his work. By the end, the reader will want to write at the top of every page of the Old Testament: This is about the Messiah.