Our beaches are eroding, sinking, washing out right under our houses, hotels, bridges; vacation dreamlands become nightmare scenes of futile revetments, fills, groins, what have you--all thrown up in a frantic defense against the natural system. The romantic desire to live on the seashore is in doomed conflict with an age-old pattern of beach migration. Yet it need not be so. Conservationist Wallace Kaufman teams up with marine geologist Orrin...