Book excerpt: RUBY CRANE IS a rising star. At 15, she sold her first book, got a movie deal, scored the hottest guy in school, and became the most popular student at Frasier High. Now, as a soon-to-be junior and published author, she's ready to make waves in New York's literary world. But every star falls back to earth one day. Ruby's accused of plagiarism - on national television. And the worst part is that the proof of her literary lies is indisputable. Her friends won't return her phone calls. Her boyfriend's gone AWOL. The media vultures are flying low, and they want answers. So Ruby does what any self-respecting headline would do. She disappears. And that's when her story really begins.