Let's start with this - I would like to say that if you plan on reading one of Perrin's novels, my opinion is to start with Fresh Water for Flowers or Three. I liked those books much better but that's my personal opinion. Links for those books take you to my Goodreads page.
For a great review check out the NPR link HERE.
What I didn't know, and it came as a complete surprise to me, is this is her first published novel. It came out in 2015! Last year I particpated in August's event Women in Translation and read Fresh Water for Flowers. That was my introduction to Perrin. When I saw Forgotten on Sunday was to be published in June I assumed this was a brand new novel. So I preordered it. * It was newly translated by Hildegarde Serle.
There are two main stories here which go back and forth between present day and WW II. The setting is mostly Milly France.
Here's the run down without spoilers.
Justine Neige is the narrator; she works at a care home as an assistant, taking care of the old people. She and her cousin Jules live with their grandparents as their parents died in an automoble accident when they were only 4 years old. (revealtions about that later) Jules is about to leave for Paris and attend university. Twenty-one year old Justine prefers to work at the old folks home and listen to the stories the residents share with her instead of seeking other employment, escaping the small town of Milly.
The WW II time period features the story of Hélène and Lucian and I liked that timeline/story very much. In present day Justine takes care of the almost 100 year old Hélène and loves hearing her stories, especially the ones about Lucian as a young man and how their life progressed.
There is quite a bit going on and in the last 20% of the book, things coming together in both time periods.