The Book of Jeremiah is primarily a message of judgment on Judah for rampant idolatry (Jeremiah 7:30-34; 16:10-13; 22:9; 32:29; 44:2-3). After the death of King Josiah, the last righteous king, the nation of Judah had almost completely abandoned God and His commandments. Jeremiah compares Judah to a prostitute (Jeremiah 2:20; 3:1-3). God had promised that He would judge idolatry most severely (Leviticus 26:31-33; Deuteronomy 28:49-68), and Jeremiah was warning Judah that God’s judgment was at hand. God had delivered Judah from destruction on countless occasions, but His mercy was at its end. Jeremiah records King Nebuchadnezzar conquering Judah and making it subject to him (Jeremiah 24:1). After further rebellion, God brought Nebuchadnezzar and the Babylonian armies back to destroy and desolate Judah and Jerusalem (Jeremiah chapter 52). Even in this most severe judgment, God promises the restoration of Judah back into the land God has given them (Jeremiah 29:10).
For a more detailed summary select the link below.
The Book of Jeremiah Summary