I have never read the book "P. S. I Love You " and this book is written 8 years in time after it.It did not matter that I had not read it as the story is discussed at the start of this book. It deals with how a woman deals with the ongoing grief from the loss of her husband when she has moved on to a new relationship. It is a thoughtfully written book on a subject that we all have to deal with at some point in our lives.I would say "have your tissues at the ready".