Once on a Time by A.A. Milne

A.A. Milne was an English writer best known for writing multiple books centering around the teddy bear Winnie-the-Pooh.  Milne was also a notable author before his great success with the creation of Winnie-the-Pooh, having written books such as Once on a Time and the Red House Mystery.

Once on a Time, published in 1917, is a fairy tale that tells the story of a war between two kingdoms.