Mirror Image: Danielle Steel

From Manhattan high-society to warn-torn France, Mirror Image is a compelling story about the mysterious bond between twin sisters.
For twins Olivia and Victoria, their bond was mysterious, marvellous, and often playful - a secret realm only they inhabited. Shy, serious Olivia, born eleven minutes before her sister, had taken over the role of mother in their lush New York estate. Free-spirited Victoria wanted to change the world, and embraced the women's suffrage movement, dreaming of sailing to war-torn Europe.
Then, in the girls' twenty-first year, as the First World War escalates overseas, a fateful choice changes their lives forever…