I have been following the Williams v Spong discussion, but can't pretend to follow all the science stuff. From a theological point of view, I think Spong asks some good questions, but has some shallow answers, seemingly unaware that the issues have been under discussion in theological circles for some decades, with more satisfactory results than the ones Spong offers.

For much better (and eminently readable)

accounts making sense of the biblical documents in the light of contemporary world-views, I find Marcus Borg's books much more satisfactory. See "Jesus, a New Vision," "Meeting Jesus Again for the First Time," "The God we Never Knew," "Reading the Bible Again for the First Time" etc.