First, I would like to give you the background of this book. Revelation was written by my favorite disciple, John. John and his brother, James, were both from Bethsaida, along with Andrew and Peter.(see in John 1:44) John and James were known as "the sons of Zebedee", and like him, they were fishermen.
In Luke, we find that John and James were in partnership with Simon Peter, who also had his own ship. These three men were very wealthy, but when Jesus called them to be "fishers of men", they dropped everything, followed, and ended up becoming part of the inner circle that followed Jesus during his earthly life. Of these three, John seemed to be the closest to Jesus, and was called "the disciple whom Jesus loved".(see in John 13:23; 19:26; 20:2; and 21:7)
John wrote the last of the four Gospels, Matthew, Mark, Luke, and John. Matthew, Mark, and Luke's books are called the synoptic gospels. Synoptic meaning, taking or involving a comprehensive mental view. John's gospel, however, is much different, and was written years later.
John also wrote the letters; 1, 2, and 3 John. But John wrote the only prophectic book in the new testemant, Revelation.
