Jesus and the Gospels by Luke Timothy Johnson is a great course. About 2/3rds of Johnson's work covers the canonical gospels, their context, and what they mean when read together and separately. He adopts a literary approach, so he's not out to construct a historical Jesus (which he thinks is a bit of a fool's errand), nor is he preaching. He is simply taking the works as literature and engaging with them. It was pretty nice and refreshing, reminding me a bit of Bart Ehrman, and the comparison is a highly favorable one. The last third of the course runs the gamut of non-canonical gospels, providing insight into their historical context, and discussing the different takes on Jesus and what you're supposed to learn from their works. He defaults at the end to the canonical four, but he also discusses the ways in which we reimagine and think about Jesus' life as a form of apocrypha in its own right. Its pretty good, if you're into studying religion or Christianity.