This book is about Emily, a twelve year old who has always lived on a houseboat, but has never gone into the water because her mother is afraid of the water. Her mother finally allows her to take swimming lessons at school and she discovers her mermaid transformation. She meets another mermaid named Shona and gets introduced to a school for mer-kids. There she discovers her true identity and finds her long lost father.
The book is written well and makes us love the witty, adventurous young girl. A nice mix of mystery, action and fantasy; a great read for a young person.