Elin Hilberbrand’s latest Summer of ’69 is a disappointment from this beloved author. The nostalgia of the late sixties isn’t enough of a backdrop to warrant a contrived plot dealing with the anxiety of having a son in Vietnam, marriage turmoil, and coming of age. Elin does her usual excellent detail of Nantucket with a brilliant writer’s essence. Yet an emotional core is missing. But hey even a flawed Elin Hiderbrand novel is better than none at all.