Who Wrote the Book of Deuteronomy?

Internally the book is clearly attributed to the hand of Moses (31:9, 24), and there are several references to Moses “speaking” the content of this book (1:9; 5:1; 29:2; 31:30). No other OT book is as clearly attributed to a human author as this one, so to suggest otherwise means that the burden of proof clearly lies with those do not hold to a Mosaic authorship of the book. Some editorial additions have been inserted (e.g., 34:5-12), but the core of this book is attributed to Mosaic composition as Joshua (Jos 1:7-8), Ezra (Ezr 3:2), and Jesus Himself attest (Jn 5:45-47). For most critics of the Pentateuch, Deuteronomy is the “D” portion of the JEDP documentary hypothesis identified with the “book of the law” found in the temple in 2Kg 22:8-11 and is a unified whole edited by a single writer who lived in the seventh century BC. For a critique of the documentary hypothesis see the Introduction to the book of Genesis.