Cardiologist Agatston (The South Beach Diet) follows up his blockbuster book on weight-loss with this volume of more than 200 recipes, a number of which are culled from the kitchens of chefs in Miami Beach and other cities. Each recipe is designated as Phase 1, 2 or 3 to help readers discern the segment of the diet for which they are appropriate. Carbohydrates are off-limits during Phase 1, but "good carbs" (like whole grains) are gradually reintroduced in Phase 2. Phase 3 segues into a less restrictive but still healthy eating regimen. Among the Phase 1 recipes are the simple Reuben Wrap (which calls for cabbage leaves instead of bread; the author notes readers "will have to have a 'rye' sense of humor for this"), as well as more complex main dishes such as Coconut Chicken and Sage and Rosemary Pork. Phase 2 and 3 eaters will find delicious options such as Sesame Baked Chicken, Crab Royale and Couscous Salad. Noting that a variety of foods and recipes combats the repetition and boredom that are many dieters' downfall, Agatston presents a wide array of choices, with plenty of enticing fish and vegetarian dishes. He also includes breakfasts, snacks and desserts, as well as ideas for home entertaining "South Beach-style" with a focus on fresh veggies, fat-free dips, shrimp and nuts for appetizers, and main dishes of grilled tuna or flank steak. Agatston leaves no stone unturned, even providing shopping lists and recipes for homemade condiments that forgo sugars. Agent, Richard Pine. (Apr. 13)Forecast: Although it may seem like everyone and their mother is on the Atkins diet, South Beach is also popular. The diet book sold more than five million copies, and many of those readers will want this follow-up.