Mix the high-octane emotions of youth with the freedom of leaving home and you've brewed up a potent new book category called "New Adult." Navigating the exhilarating, sometimes dangerous chasm between adolescence and adulthood, these novels — aimed at readers out of high school — are roaring up the best-seller list. The setting often is a college campus and the vibe is intense as only young love can be. It's sex, bad boys, too much drama and, if you consulted the characters' parents, not nearly enough library time!