Stepsisters — Francine Pascal

Will Cheryl fit in at Sweet Valley High?
Jessica and Elizabeth Wakefield have a new neighbor--their friend and sorority sister Annie Whitman. Annie's mother is getting married to a famous African-American photographer from New York City, and the new family is moving in next door.
Annie can't wait to introduce her stepsister-to-be to all her Sweet Valley High friends. She tries her best to make Cheryl feel at home in Sweet Valley, but Cheryl, used to the excitement of New York City, doesn't seem interested in fading into the crowd. Annie is hurt and thinks Cheryl's a snob.
Can two such different people ever become sisters?