Gossip Girl author Cecily von Ziegesar has sold a novel to Hyperion in a deal said to be in the seven figures. Cum Laude, repped by Suzanne Gluck, is for adults, although judging from the description—"a murder story involving a preppy girl from Greenwich, CT, a hippie from the city, a jock-turned-artist from the suburbs, and a brother-sister duo"—it probably won't be too challenging for fans of Blair, Serena and co. [Observer]