The biblical book of Deuteronomy is the fifth book of the Hebrew bible and consists of sermons delivered by Moses to his people at the end of their forty years of wandering but before they reach the Promised Land. Modern estimations about the authorship of Deuteronomy have ranged from an uncritical acceptance of Mosaic authorship (ca. 1400–1200 BCE) to the idea that the work is a fictive autobiographical account written centuries later. Although the source is technically anonymous, the content is attributed to Moses himself. However, it is realistic to think that an editor or editors arranged the text centuries later.