Books that are about grief, that are NOT about death

As the title suggests, please recommend me books that are about grieving but not about death. It could be grieving the loss of youth, the loss of a parent-child relationship from what it used to be, the loss of childhood, losing objects. Ideally, the book should not be about grieving the death of a person e.g Crying in H Mart, I'm Glad My Mom Died

Bonus if the book is less than 250 pages!