Joshua. TOTC. IVP Academic, 2008.
This commentary consistently gets great reviews, but I just can't rate it highly. Hess spends a lot of time on the historicity of Joshua from a very evangelical perspective, but he does not spend much addressing the very serious challenges that come from non-evangelical archaeology and scholarship. Perhaps this is a limitation of the smaller size of the Tyndale commentaries, but I was left wanting more from this book.
Genesis. 2 Vols. WBC. Thomas Nelson, 1987.
As others have noted, the format of the Word series is terrible, and makes for difficult reading. That being said, this is a great commentary. Wenham definitely subscribes to Documentary Hypothesis, although he does not strictly follow Wellhausen as another reviewer noted. One strong point, in the first volume especially, is Wenham's analysis of other Ancient Near Eastern creation stories, and presenting Genesis as a polemic against them. Some of the information is dated (Wenham cites material he calls the "latest scholarship," but the first volume was published 30 years ago).