I'll add one more thing:
If you read any work of non-fiction this year concerning this issue, I suggest that you read
Hidden Gospels: How the Search for Jesus Lost its Way
Jenkins goes into depth concerning the theoretical gospel of Q, and the Gnostic 'gospels' that the Jesus Seminar has been promoting for the last several years.
Jenkins' thesis is devistating. It completely and wholly obliterates the very foundation of the Jesus Seminar.