Book of Deuteronomy have given various answers to the problem. The Deuteronomistic history theory is currently the most popular (Deuteronomy was originally just the law code and covenant, written to cement the religious reforms of Josiah, and later expanded to stand as the introduction to the full history); but there is an older theory which sees Deuteronomy as belonging to Numbers, and Joshua as a sort of supplement to it. This idea still has supporters, but the mainstream understanding is that Deuteronomy, after becoming the introduction to the history, was later detached from it and included with Genesis-Exodus-Leviticus-Numbers because it already had Moses
Society for Old Testament Study Old Testament at the time of publication, namely The People and the Book (ed. A.S. Peake; Oxford, 1925), Record and Revelation (ed. H.W. Robinson; Oxford, 1938), The Old Testament and Modern Study (ed. H.H. Rowley; Oxford, 1951), Tradition and Interpretation (ed. G.W. Anderson; Oxford, 1979), and Text in Context (ed. A.D.H. Mayes; Oxford, 2000). The Society has also commissioned from time to time other multi-essay volumes devoted to specific topics, namely Documents from Old Testament Times (ed. D.W. Thomas; London, 1958), Archaeology and Old Testament Study (ed. D.W. Thomas; Oxford, 1967), Peoples of Old Testament Times (ed. D.J. Wiseman; Oxford,