The Rising Tide, a YA novel of suspense by Mabel Esther Allan

Title: The Rising Tide
Author: Mabel Esther Allan
Publication: Walker and Company, hardcover, 1976
Genre: YA Suspense
Setting: 20th century England

Description: When Fennel Chalfont learns she has inherited three tiny islands near Wales from an aunt, she invites her best friend Sue to go live there with her, as one does.