Bart Ehrman’s “Jesus Interrupted” is another in the line of books attempting to challenge orthodox understandings of the nature of the Bible and the validity of faith, more or less on the line of the Jesus Seminar approach.
Ben Witherington has a multipart blog/essay essentially taking on Ehrman on his own ground, in his own terms. It seems to this layman to be excellent reading, and so I link to it below.