The Book of Haggai consists of only two chapters and takes place in a historical setting in 520 BC (about 18 years after Cyrus had conquered Babylon and issued a decree allowing captive Jews to return to Judea).  The author is believed to be Haggai, likely an older man approximately 70 years of age.  Haggai’s message is filled with urgency for the people to proceed with the rebuilding of the second Jerusalem temple.  Unlike most of the other prophets, Haggai explicitly dated his prophecies, down to the day, giving us an extremely accurate date of authorship.