Jesus

4.5 but I'll round up because I know Ehrman gets dinged on here.

I think this was Ehrman's first book for the general public, and it's a great introduction to the topic. He doesn't lead with his views, but rather takes the time to explain how historians evaluate evidence, so that you can think about the Gospels for yourself.

Earlier this year, I read one of his more recent books, Jesus Before the Gospels. It explores oral transmission in depth, something that gets a few pages here. One thing I noticed is that, with the benefit of fifteen additional years of researching, teaching, and thinking, Ehrman's list of facts about the historical Jesus has shrunk since he wrote Apocalyptic Prophet of the New Millennium, so I wouldn't take this to be the be-all, end-all of What Jesus Actually Said and Did, but rather a great starting point.