Patricia Reilly Giff, WILD GIRL

Tween novel about a girl named Lidie, a talented horse rider, who dreams of racing horses. Her father and brother left Brazil years before to start a life, planning to send for her. The novel begins the day she leaves Brazil to join them in New York. There, she discovers the difficulties of navigating other people's expectations. She must assimilate to a new environment (her English is not fluent, and her teacher doesn't understand that she is advanced in math) and find a way to reintegrate herself with her father and brother, who still think she likes pink and Minnie Mouse and doesn't know how to sit a horse. Told partly by "Wild Girl," a filly her father has bought and partly in first-person by Lidie.