Here's a rich irony: I'm writing today about a new children's book, but I can't describe the plot in a family newspaper without warning you first that it is entirely inappropriate for children. The book is "Rainbow Party," by juvenile fiction author Paul Ruditis. The publisher is Simon Pulse, a kiddie lit division of the esteemed Simon & Schuster. The cover of the book features the title spelled out in fun, Crayola-bright font. Beneath the title is an illustrated array of lipsticks in bold colors. The main characters in the book are high school sophomores -- supposedly typical 14- and...