Book excerpt: David Paul Appell, a resident of Miami, has an illustrious record in journalism, including scores of travel articles for major magazines, and long stints as a top editor of important travel magazines. This new edition of his previous "Miami and Key West" has been brought thoroughly up-to-date, including close attention to towns along the route to Key West, and to the continuing growth of Miami and Miami Beach in art galleries, museums, nightspots, and remarkable restaurants. As a fervent admirer of south Florida, he brings both color and practicality to this Easy Guide.