The Christian Bible is divided into two parts. The first is called the Old Testament, containing the 39 books of Hebrew Scripture, and the second portion is called the New Testament, containing a set of 27 books.
The Old Testament Hebrew Scriptures are the collection of books that forms the first of the two-part Christian Biblical canon. The contents of the Old Testament canon vary from church to church, with the Orthodox communion having 51 books: the shared books are those of the shortest canon, that of the major Protestant communions, with 39 books.
The New Testament is a collection of 27 books, of 4 different genres of Christian literature (Gospels, one account of the Acts of the Apostles, Epistles and an Apocalypse). Jesus is its central figure. The New Testament presupposes the inspiration of the Old (2 Timothy 3:16). Nearly all Christians recognize the New Testament (as stated below) as canonical scripture.