Warm memories and good food greeted Mrs. Potter's  retum to her beloved Nantucket, but so did a  chilling surprise. Her old friends had a dangerous new  look: dangerously thin and dressed to  kill!<br><br>Was something sinister going on? A handsome  new diet doctor had won over the richest  widows on the island with his weight-loss secrets -- and his very  personal attention. But when sudden death was  seved up along with delightful Down East dishes (try sinfully rich Scrimshaw Inn Rum Pie or tangy Nantucket Cranberry Cup Pudding!), the inimitable Mrs. Potter knew it was time to stir the pot and come  up with a devilishly clever culinary killer.