Adopted & kidnapped?

A story with suspense and mystery and a secret that one of the band mates were holding since they were little. This girl Rose and her half sister Maddy will go on the adventure of their life's and being adopted by One Direction but it will all go south when they get kidnaped will they find them?? This book Is the first of three you can read it in any order but it will make better sense if you read it in order. Rated R