I first read Girl, Missing about 5 years ago, loved it and bought every other Sophie McKenzie book out there, and naturally I was thrilled to hear that there was going to be a sequal. I read sister, missing in a day, it was enjoyable and page turning however, I felt that it was too young for me, it was written for the girl I was 5 years ago, not who I am today. So if, like me you read Girl, Missing a long while ago and was interested in the sequal I wouldn't recommend it, but if you read Girl, Missing yesterday and was wondering if you should buy the sequal then go for it! I did enjoy it, the story line was good, and very fast-paced! A good holiday read, especially if you read them both, one after another!