I worked with a priest once who insisted on stating the Pauline authorship of Hebrews. Would that either of us looked more carefully at GILM 122:
The traditionally accepted titles for books are to be retained with the following exceptions.
1. Where there are two books with the same name, the title is to be: The first Book, The second Book (for example, of Kings, of Maccabees) or The first Letter, The second Letter.
2. The title more common in current usage is to be accepted for the following books:
-I and II Samuel instead of I and II Kings;
-I and II Kings instead of III and IV Kings;
-I and II Chronicles instead of I and II Paralipomenon;
-The Books of Ezra and Nehemiah instead of I and II Ezra.
3. The distinguishing titles for the wisdom books are: Book of Job, Book of Proverbs, Book of Ecclesiastes, Song of Songs, Book of Wisdom, and Book of Sirach.
4. For all the books that are included among the prophets in the Neo-Vulgate, the formula is to be: “A reading from the Book of the prophet Isaiah, or of the prophet Jeremiah or of the prophet Baruch” and: “A reading from the Book of the prophet Ezekiel, of the prophet Daniel, of the prophet Hosea, of the prophet Malachi,” even in the case of books not regarded by some as being in actual fact prophetic.
5. The title is to be Book of Lamentations and Letter to the Hebrews, with no mention of Jeremiah or Paul.