Book suggestion:
'Deuteronomy', J. G. McConville (Apollos Old Testament Commentary, IVP Press)
Apollos Old Testament Commentary[Y][Y][*][Y]
+1 for McConville. Has lots of recommendations eg
Mathison: http://www.ligonier.org/blog/top-5-commentaries-on-the-book-of-deuteronomy/
Challies: http://www.challies.com/resources/best-commentaries-on-deuteronomy
And Wenham says it's "theologically sensitive and provides a fresh approach that needs serious consideration"
Anything by McConville is worth reading.