The Book of Malachi, also called The Prophecy of Malachias, the last of 12 books of the Hebrew Bible (Old Testament) that bear the names of the Minor Prophets, grouped together as the Twelve in the Jewish canon. The book of Malachi helps in understanding the unchanging principles and merciful love of God.
Book of Joel, second of 12 Old Testament books that bear the names of the Minor Prophets. Some commentators have claimed that Joel is a prophet of darkness and gloom. But, when we look at Joel's book from the point of view of God’s people, he emerges as the proclaimer of grand tidings of salvation.