Moon Within (Scholastic Gold) - Aida Salazar - Bog

Eleven-year-old (nearly twelve) Celi Rivera, who is a mix of Black-Puerto Rican-Mexican Indian is uncomfortable about her approaching period, and the changes that are happening to her body; she is horrified that her mother wants to hold a traditional public moon ceremony to celebrate the occasion--until she finds out that her best friend Magda is contemplating an even more profound change of life.