Speaking of the halachot of mezuza, I noticed that the Yale Judaica Series published a new (2004) volume of their translation of Maimonides' Mishne Torah. It covers the second part of The Book of Love, including the laws of mezuza, and was translated by Prof. Menachem Kellner of Haifa University.
On the drive back, with my friend Lia, we stopped at a place in New Haven called Claire's Corner Copia. It is amazing. I can't recommend it highly enough. With a nice big kosher sign next to the counter.