This is a really good book to read. I would say it’s funny and scary. This boy and his sister goes to his uncles boat. He goes scuba diving and finds a mermaid. They have been keeping her on the boat. But then a boat pulls up next to them and they went aboard on to there boat.What will happen next? the aurthor is called R.L.Stine have done a hole collection of the Goosebumps. I would recomend you read it. I also recomend it as a 8+ and a 5* book. Reader beware your in for a scare!!!!