The New Testament is a collection of books within the Christian Bible. It contains four books that are abbreviated as REV, EPH, ISA, and JAS. REV stands for Revelation, which is the last book in the New Testament and is written by John the Apostle. EPH stands for Ephesians, which is written by Paul the Apostle and is the tenth book in the New Testament. ISA stands for Isaiah, which is written by the prophet Isaiah and is the twenty-fourth book in the New Testament. Lastly, JAS stands for James, which is written by James the Just and is the fifty-first book in the New Testament.