These number 73, according to the Catholic Canon of books which really contain the revelation of God to man. According to the Council of Trent, there are three groups in the Old Testament, embracing 46 books:

21 historical books:
Genesis
Exodus
Leviticus
Numbers
Deuteronomy
Josue
Judges
Ruth
1,2Kings (1,2Samuel)
3,4Kings (1,2Kings)
1,2Paralipomenon (1,2Chronicles)
Esdras
Nehemiah
Tobias
Judith
Esther
1,2Machabees
7 didactical books:
Job
Psalms
Proverbs
Ecclesiastes
Canticle of Canticles (Song of Solomon)
Wisdom and
Ecclesiasticus (Sirach)
18 prophetical books:
Isaias
Jeremias (with Lamentations)
the major prophets
Baruch
Ezechiel
Daniel
the minor prophets
Osee
Joel
Amos
Abdias or Obadiah
Jonas
Micah
Nahum
Habacuc
Sophonias or Zephaniah
Aggeus or Haggai
Zacharias
Malachias

The difference between the Jewish and Catholic counting is due to the fact that the Catholics accept also the so-called deuterocanonical books.

There are 27 books of the New Testament:

the 4Gospels
Matthew
Mark
Luke
John
the Acts of the Apostles
14Epistles of Saint Paul
Romans
1,2Corinthians
Galatians
Ephesians
Philippians
Colossians
1,2Thessalonians
1,2Timothy
Titus
Philemon
Hebrews
7 Catholic Epistles
James
1,2Peter
1,2, and 3John
Jude and
the Apocalypse, the only prophetical book of the New Testament.

Each book of the Bible is treated in this document under its own title.

Bibliography Information
Entry for 'Books of Chronicles'. 1910 New Catholic Dictionary. https://www.studylight.org/dictionaries/eng/ncd/b/books-of-chronicles.html. 1910.

Bible Dictionaries Books of Chronicles

1910 New Catholic Dictionary

Bible Dictionaries
Books of Chronicles