Ahh…So many books come to my mind when I see this. So, I will go with the last book that made me turn into an emotional wreck.
The book that I choose for it would be “A Thousand Splendid Suns” by Khaled Hosseini (Click here for book review)
I had read this book a long time ago, and recently picked it up again. So, I was kind of expecting the emotions, but the sheer intensity of the emotions, especially in the ending, took me by surprise.