Book excerpt: 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! 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.