Now that the cold weather is likely here to stay, at least until the next freak 60 degree day, you might want to hunker down with a cozy-sounding book. Steven Gdula's The Warmest Room in the House: How the Kitchen Became the Heart of the Twentieth-Century American Home ($29.95, Bloomsbury.), will warm you right up. This whirlwind tour of the past hundred years or so sheds light on how the kitchen was often a reflection......