So from the title of the book "the girl in the mirror" I was already interested and wanted to know more, now the book design isn't my cup of tea, it's not bad just not necessarily something I would personally go for. As for the actual plot it sounds so good and I can't wait to know more... Essentially her twin is jealous and envious of her sister to the point she wants to be her and I think this is going to have a very sinister twist which is exciting.