The Husband's Secret by Liane Moriarty
Cecelia finds a letter from her husband that she is meant to read after he has died. She eventually opens the letter and what she learns impacts not only her life but also the lives of others around her.
What Alice Forgot by Liane Moriarty
Alice wakes up on the floor of a gym bathroom, having forgotten the last ten years of her life. Over the course of the story, Alice learns the details of her own life that hardly resembles the life she was living ten years earlier.