Candace Bushnell, the woman who launched a thousand well-heeled tourists on to a stoop in the Greenwich Village, is now jumping on the popular Young Adult bandwagon, having announced that she's inked a deal to write two teen novels. Get excited, they're Sex and the City prequels! Titled The Carrie Diaries, they'll take readers "back to Carrie Bradshaw's formative years in high school, giving an inside look at Carrie's friendships, romances and how she realized......