[ The Nightingale ]ended up being a huge undertaking - a daunting amount of research on a subject that many people know intimately, a country I had not yet been to when I first started planning the book, an entire war.

Thematically, we're both [with Kristin Hannah ] interested in women's experiences and women's stories, and until now, you've mostly dealt with how it feels to be a wife/mother/sister/name your poison in today's world. But this story [The Nightingale ] is told from the perspective of two sisters during the German occupation of France in WWII.

To be honest, I wrote so many drafts of this book [ The Nightingale ] and changed the characters so many times; the real surprise is that I finished the book at all.

In the end, there's only one thing you can believe. Bodies are honest; they don't lie.

[ The Nightingale ]ended up being a huge undertaking - a daunting amount of research on a subject that many people know intimately, a country I had not yet been to when I first started planning the book, an entire war.

Andrée De Jongh story led me to other stories of women who joined the Resistance in France. I found literally dozens of memoirs written by women who had become spies and couriers and helped to create the escape network. These women were like action-star heroes.

There were others, women with stories that were told in a quieter voice: women who hid Jewish children in their homes, putting themselves directly in harm's way to save others. Too many of them paid a terrible, unimaginable price for their heroism. And like so many women in wartime, they were largely forgotten after the war's end.There were no parades for them, very few medals, and almost no mention in the history books.