Seventeen-year-old Connie Blair parts from her twin sister Kit and the small town Meadowbrook for a glamorous modeling job at a Philadelphia department store. Soon after, she moves on to an exciting new job at advertising agency Reid & Renshaw. Along the way, Connie solves a battery of intriguing mysteries, some of which are set in such exotic locals as Caribbean islands and Mexico. This twelve volume series by Betsy Allen was published from 1948 to 1958.