The Republic of LoveBy: Carol Shields With a viewpoint that shifts as crisply as cards in the hands of a blackjack dealer, Carol Shields introduces us to two shell shocked veterans of the wars of the heart. There's Fay, a folklorist whose passion for mermaids has kept her from focusing on any one man. And right across the street there's Tom, a popular radio talk show host who has focused a little too intently, having married and divorced three times. Can Fay believe in