Emily Windsnap has lived on a boat her whole life - yet her mother seems oddly anxious to keep her away from the water. When she is finally allowed to have swimming lessons, Emily makes a startling discovery — she has a tail!

As Emily explores the kingdom under the sea with her mermaid friend Shona Silkfin, she learns a family secret, and braves the wrath of Neptune to find the father she has never met and reunite him with her mother.

A breathlessly exciting magical adventure story, where you will meet all sorts of interesting characters, human and otherwise, and dive an enchanting underwater world.

Liz Kessler lives on a narrowboat in rural Cheshire. She has worked as a teacher and journalist, and is now an editorial consultant, offering advice to other children's writers.

A familiar voice to listeners of BBC Radio, Teresa Gallagher has recorded hundreds of plays and readings, and was most recently heard as Anna in Anna Karenina . On television, she has presented the BBC children's series Playdays . Films include Topsy-Turvy and The Jacket , which stars Adrian Brodie and Keira Knightley .