The Catholic Bible is made up of 73 books that were in the Bible (the Septuagint) that Our Blessed Lord used. St. Jerome translated all of the books of the Bible into Latin, now known as the Vulgate in the fourth century, this has been the Bible that the Church has used since then.
The Protestant Bible is made up of 66 books, Martin Luther found the teachings in seven books of the Old Testament problematic (as well as some in the New Testament). He was successful in throwing out the ones in the Old Testament, but the other "reformers" would not allow him to gut the New Testament in the same way. His translation of the Old Testament was based on the Jewish Scriptures that were canonized in the first century AFTER Our Blessed Lord died as they did not want to keep the same seven books as supporting the Catholic Church. You can see why Martin Luther sided with the Jews over the Christians. This is the Bible that is used by all protestant churches, including Methodists.