Carol Sanders and her mother come to a small island in Scotland to work for summer. They work for Mr Ross, an owner of this island. Persons living in the island are only Mr Ross, his wife and his employees. Mr Ross is a mysterious man. Anytime he is cool and quiet. He is young but rich enough to buy the island. He doesn't let people to take pictures of him. He has a room no one can enter in his mansion. Carol thinks he has some secret and tries to reveal it.
If you want to learn English but don't want to study very hard, I recommend you this book. The story of the book is mysterious, so you want to know the truth and go on reading. It's more interesting to read texts like this than boring English textbooks and newspapers. In addition, difficult words and complicated sentences aren't used in the book,and the story isn't too long. In Oxford Bookworms series, there are from elemental level books to high level ones. So you can choose texts fit for your English skill. In short, this book is interesting and suitable to study English, so I recommend you it.