Book excerpt: 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 H. Pilkey Jr., in an evaluation of America's beaches from coast to coast, giving sound advice on how to judge a safe beach development from a dangerous one and how to live at the shore sensibly and safely.