The Times Literary Supplement this week reviews Richard Bauckham 's Jesus and the Eyewitnesses: The Gospels as Eyewitness Testimony.
Bauckham's book is getting a lot of press. I have it and hope to get to it soon.
Here's A. E. Harvey's summary of his review: "Richard Bauckham’s careful and eloquent presentation of his argument, supported not just by careful scholarship but by admirable common sense, deserves earnest consideration by all who have the training and the perseverance to pursue the elusive explanation of one of the most tantalizing literary relationships in ancient literature, appropriately known since the nineteenth century as “the Synoptic problem”."http://tls.timesonline.co.uk/article/0,,25349-2633034,00.html