Pierre Lemaitre is a French novelist and screenwriter.
This is more of a have read, than an am reading, as I tore through this very rapidly.
From the Blurb:
Sophie is haunted by the things she can't remember - and visions from the past she will never forget. One morning, she wakes to find that the little boy in her care is dead. She has no memory of what happened. And whatever the truth, her side of the story is no match for the evidence piled against her. Her only hiding place is in a new identity. A new life, with a man she has met online. But Sophie is not the only one keeping secrets ...