Mirror Image is a novel by Danielle Steel

Danielle Steel

Danielle Fernandes Dominique Schuelein-Steel , better known as Danielle Steel, is an American romantic novelist and author of mainstream dramas....

 about identical twins, Victoria and Olivia Henderson set during the First World War

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

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Plot summary

When Victoria's reputation is seriously at risk the only way to retrieve it is by marrying the handsome lawyer Charles Dawson, who also works with the girls' father, Edward Henderson. Olivia is inclined to stay and help their father, who is ill, but Victoria needs him the most when her marriage seems to be failing. It is not helped by Charles's 10-year-old son, Geoffrey, who is still distraught after losing his mother Susan, Charles' first wife, on the Titanic.

When Victoria proposes an unthinkable plan Olivia is forced to accept, leaving her with a marriage she never thought she could have and her sister going off to help in France, when World War I is in full throttle.