Scholars have attempted to reconstruct something of the history of the oral traditions behind the Gospels, but the results have not been too encouraging.The period of transmission is short: less than 40 years passed between the death of Jesus and the writing of Mark's Gospel.The Bibles of the Eastern Churches vary considerably: the Ethiopic Orthodox canon includes 81 books and contains many apocalyptic texts, such as were found at Qumran and subsequently excluded from the Jewish canon.As a general rule, one can say that the Orthodox Churches generally follow the Septuagint in including more books in their Old Testaments than are in the Jewish canon.
Collectively, these three books are known as Sifrei Emet (an acronym of the titles in Hebrew, איוב, משלי, תהלים yields Emet אמ"ת, which is also the Hebrew for "truth").
Parallel to the solidification of the Hebrew canon (c.
3rd century BCE), only the Torah first and then the Tanakh began to be translated into Greek and expanded, now referred to as the Septuagint or the Greek Old Testament.
Among Christian denominations there is some disagreement about the contents of the canon, primarily the Apocrypha, a list of works that are regarded with varying levels of respect.
Attitudes towards the Bible also differ amongst Christian groups.