He's written a few scholarly tomes as well as a book of Biblical criticism from a historical perspective, The Unauthorized Version. He is a Fellow of New College, Oxford.
In the preface to The Unauthorized Version he states,
"I write as an atheist, but there are Christian and Jewish scholars whose versions [of the Bible] would be far more radical than mine. They will find this historians' view conservative, even old-fashioned, but there are times when atheists are loyal friends of the truth."