Treehouse Books & Melanie Voland 
Why The Sea Sighs: Traditional Mermaid Folk Stories Collection [EPUB ebook] 

A lonely little princess, becomes lifelong friends with a sea serpent, who helps her with her troubles… But there is something the sea serpent has never told her… Can they help each other?… A magical, sweet, sad, romantic, traditional fantasy folk story, about true friendship, love and adventure, with many magical twists in the tale. Suitable for all ages. This short story is book 11 in our Traditional Mermaid Folk Stories Collection.