The Jewish Gospels by Daniel Boyarin
One of the books I often recommend is "The Jewish Gospels" by Daniel Boyarin. A short but provocative book written by an eloquent and erudite professor who taught at Hebrew University, Yale, Harvard, Yeshiva University and now at Berkley. The book presents a cogent academic take on the Jewish nature of the Gospels. Though many would deem the gospels outside of the pale of Judaism, professor Boyarin insists they are quite Jewish.