Melody Beattie -- The Library -- 52 Weeks of Conscious Contact

Some people call this the sad book.
In it, Melody tells the story of the death of her son and describes the early years of her grieving process. It is neither maudlin nor gushing with emotions.
Warning: if you have any unresolved grief issues, this book will bring them to the surface.
A happy ending lets readers know that even the longest tunnel has a light – and a lesson – at its end.