The Minor Prophets are the neglected child of the canonical family, but seriously, there is some good stuff there. The Minor Prophets include Hosea, Joel, Amos, Obadiah, Jonah, Micah, Nahum, Habakkuk, Zephaniah, Haggai, Zechariah, and Malachi. Each book has something interesting and unique and the collection as a whole is worth studying in its own right.
I enjoyed Goldingay’s The Lost Letters to... referenced here. I listened to the audiobook.