The Dig by John Preston is good - very much worth a read if you are interested in archaelogy or enjoy novels such as J.L. Carr's A Month in the Country.
It's about the excavation at Sutton Hoo in Suffolk in 1939 which resulted in one of the most significant discoveries of Anglo-Saxon artefacts ever made, but told from the viewpoints of several of those involved in the dig, this multi-faceted account is a comprehensive and compelling treatment of its subject.
Part of its strength is down to what it leaves unsaid or simply suggested, fittingly for a book about 'impressions'; what was found to be inside the barrow on Mrs. Edith Pretty's land was a ship-burial, but the ship itself had perished leaving only its imprint. This restraint in the writing contributes to a beautifully crafted and atmospheric novel about a remarkable event, and it's a book which I warmly recommend whether or not you've been to Sutton Hoo (as I have) or seen the treasure in The British Museum.