I don't know what you think about sequels. I mean the ones where an author takes a book I love and after a hundred years writes one. I'm not usually a fan of sequels, or rewrites, but it depends on the book and the author, and how well the book is written.
I did like this book, it doesn't take Sarah Crewe any farther in life, although she does make an appearance. It is about life at Miss Minchin's after Sarah is gone. I don't think it has quite the charm of the original book, nor the depth, but it is a well written book, and very good read, and kept me interested to the end. In fact, the ending was VERY unexpected. I think you'll enjoy it if you like books about girls. I did.