'The Correspondent' is an epistolary novel, but can letters tell the whole story?

Virginia Evans’ The Correspondent became a runaway hit for its exploration of a life told through letters. When readers meet Sybil Van Antwerp she’s in her 70s, and she takes readers on a journey through her various correspondences — which include names as revered as Joan Didion and Ann Patchett. But Sybil isn’t telling us everything, and her clever prose might hide as much as it reveals. In…