Perhaps heartbreaking is the wrong word for a very happy event, one that brings tears to your eyes because you know what the alternative would have been. But however you describe it, the letters that Don Gazzaniga finds on his web site ever since his first cookbook was published easily bring tears to the reader's eyes. "The doctor told him that the very low-sodium diet is the main thing responsible for this success and I couldn't wait to share it with you." "When I said that your book saved [my husband's] life, I meant it." That first cookbook was a surprise to medical professionals and their patients alike. Doctors have always believed that no one could ever get below 1500 milligrams of sodium a daily diet. "Keep it at that level," Don's doctor told the sixty-three-year-old Gazzaniga in 1997. He had diagnosed his patient's problem as congestive heart failure and was about to sign him up for the only solution believed possible, a heart transplant.To Don, this was a challenge. After a lot of research, the help of nutritionist daughter, Jeannie, familiarity with the cuisines of many different countries, and hours in the kitchen, Don came up with a large selection of recipes and a twenty-eight-day menu that never went above five hundred milligrams of sodium a day! Yep! That's five hundred. And the food was delicious.The recipes in that first diet were gathered in a general cookbook that told readers just about everything they needed t