A History of the Synoptic Problem, by David Laird Dungan, is an accessible, academic study of a question that has needled readers of the New Testament since before the Bible was canonized: How does one reconcile the different accounts of Jesus's life given by the four gospels? Today the most highly publicized answer to this question is the one offered by John Dominic Crossan and the Jesus Seminar, who seek to reconcile the differences among the gospels by designating some events and statements in the gospels historically true and others false. There are lots of other ways to explore...