<human>:  With regards to the Bible and Christian ethics, who is the author of the book of Revelation?
<bot>: The book of Revelation is a collection of visions, written by the apostle John. The book is part of the New Testament of the Christian Bible, and it describes a series of apocalyptic visions. The book is divided into seven chapters, and it is traditionally believed to be written during the reign of the Roman emperor Domitian, though there is some debate about this.