Rosa's Lie — Francine Pascal

Family secrets.
Rosa Jameson, daughter of immigrant parents, decides to start a new life at Sweet Valley High as Rose. When Jessica Wakefield and Lila Fowler ask her to pledge their exclusive sorority, Pi Beta Alpha, Rose believes her scheme is working. She's sure they would never have asked her if they knew she was Mexican. Rose's secret is safe-until her grandmother from rural Mexico pays an unexpected visit.
Rose is determined to hide Nana from her friends during sorority pledge week. But as Nana teaches her to be proud of her heritage, Rose becomes ashamed of her deception. Will being true to her heritage mean losing her friends' trust and friendship forever?