After the churches (Revelation chapters 3-4: the church age), John was invited to the throne room of heaven. There he saw God sitting upon His glorious throne surrounded by angels and elders. But the key to understanding Revelation 4 and 5 is centered on the BOOK that He is holding in his right hand. No one, other than the Lamb of God – Jesus, the Messiah – is worthy to receive the book and reveal its contents. This is the bulk of Revelation (6-20).