The Two Lives of Lydia Bird

I have a friend who forsake Marian Keyes forever because of the book where the boyfriend dies. So I'll start by saying this (and it's not a spoiler) it's unbearably sad. Lydia loses her fiancee the night of her birthday, and starts ‘meeting' him in a parallel life where it hasn't happened by night. It's about grief, the kind one feels and it's so difficult to explain. But it becomes also about love, in other ways, and eventually also in that way. So (now a spoiler:) it ends happily, but the way until then is so, so painful and bleak, everybody who has ever lost someone will feel it in their hearts until the last page.
That said, Josie Silver has a marvelous narrative, deep and sympathetic, light and real: it's easy to love her characters and live with them.