The Paris Library by Janet Skeslien Charles

In 1939, Odile gets a job as a librarian at the American Library in Paris. Odile, a native Parisian, loves that the staff and patrons at the library are from all over the world. Soon, however, with the Nazi occupation, life in the city becomes dangerous, and not even the library is safe. In an alternate storyline, it's 1983 and Lily lives with her parents in a small town in Montana next-door to Odile Gustafson. After Lily's mother passes away, Odile becomes a friend and confidante to Lily throughout her teenage years. The Paris Library is an engaging story of friendship and a fascinating retelling of the history of the American Library in Paris.