Ariel had always been a loner, a dreamer, a poet. But all that changed when Kirsten, the sister she never knew came to live with them. She's from southern California and is the exact opposite of brown-haired quiet Ariel. Ariel had always wanted a sister--and so had Kirsten. And as unalike as they are, maybe they could discover each one had something to teach the other about life, boys, and loyalty....
Used availability for Beverly Sommers's Meaning of Sisterhood
August 1993 : USA Mass Market Paperback