The book of Joel is about a locust invasion. It begins with the plague of locusts, and moves to the call for repentance. This small book of three chapters covers some of the most profound questions mankind has asked throughout history. The book of Obadiah is the shortest book in the bible and is about a feud between two brothers that spans hundreds of years. The author is anonymous. God said every generation needs to read this and adjust their life to be saved.