The Crystal Snowstorm by Meriol Trevor

Title: The Crystal Snowstorm (Letzenstein Chronicles #1)
Author: Meriol Trevor
Publication: Bethlehem Books, trade paper, 1997
Genre: Children’s Historical Fiction

About the Author: Meriol Trevor (1919–2000), who graduated from St. Hugh’s College, Oxford in 1942, was a prominent 20th-century Catholic writer of adult and children’s fiction, having converted as an adult. She is best known for an award-winning biography of Cardinal Newman. As a child, she and her best friend created imaginary islands with complicated royal genealogies, which later inspired the Letzenstein Chronicles, although this series was not published until Trevor was in her 70s. Like C.S. Lewis, she used fantasy to show the values of her faith and religion. Scott, I see she is on your list, so I will be interested to see what you think of her adult work (when you get there).