I don't know of a book but maybe other approaches would work. Help her to "know" her mother by showing her pictures and telling her stories about her mom. Take her to places her mom knew and liked. Let her talk about her feelings and just listen. Is there such a thing as a teen support group that she could be a part of?? She probably just wants to be like the other kids and have her mom as her friends do. Life isn't always fair, but she'll keep looking for something to make her feel better. Teen years are difficult times. Just my thoughts...