The cover art on the Vintage trade paperback edition -- a folk art mermaid set against a background musical score -- ties in well with elements of the story. Moranna created a mermaid tale to entertain her girls when they were still with her; she carves folksy images of her Scottish ancestors to support herself; and Moranna performs concerts on a painted piano board every morning to an audience of chairs in her kitchen. The cover illustration also captures the whimsical, fun-loving nature of Moranna (when she isn't being contrary and self-absorbed).
There are lots of other interesting and well-rounded characters too. It's a powerful and uplifting story of redemption and family pride.