There are 3 books in the Great War Great Love series. The newest book is Ella's Promise which came out in 2019.

1
Julia's Gifts

Book cover of Julia's Gifts
"Outstanding and unforgettable book!" Jean Heimann, authorAs a young girl, Julia began buying gifts for her future spouse, a man whose likeness and personality she has conjured up in her mind, a man she calls her “beloved.” Soon after the United States enters the Great War, Julia impulsively volunteers as…
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2
Charlotte's Honor

Book cover of Charlotte's Honor
After she receives a telegram that her brother has been killed in action during the Great War, 21-year-old Charlotte Zielinski enlists as a medical volunteer. She eventually begins working in the death ward of the field hospital near Soissons, France, holding dying men's hands and singing them into eternity.Dr. Paul…

3
Ella's Promise

Book cover of Ella's Promise
FINALIST in the 2020 IAN Books Awards and 2020 International Book Awards in Religious Fiction! When she joins the war effort during the Great War, American nurse Ella Neumann doesn’t see allies or enemies. The daughter of German immigrants, all soldiers -- Allies or Axis -- are human beings in…