I just finished "The Road" by Cormac McCarthy. When my sister loaned it to me she described it as being "devastatingly sad." I would say that I have to agree. It's simply heartbreaking.
The book is set in a post-apocalyptic era and is told primarily from the perspective of an unnamed father who is traveling with his son to the coast. The world is utterly devastated. It is always dark and everything is covered with ash. Father and son eke out a hopeless survival by scavenging what they can from ruins and wreckage as they travel along the road to the sea.
Perhaps I'm overreacting, but I had such a visceral reaction to reading this book that I've found myself wanting to cling to Cameron.
The book was selected for Oprah's Book Club and two weeks later was awarded the 2007 Pulitzer Prize for Fiction. It's the best book I've read in a long, long time.