A book that made you cry

The book that first comes to mind is Black Beauty but I haven’t read that since I was child. Other than that there isn’t many because I tend to avoid sad stories where possible as they greatly effect my mood.  I don’t think this one made me cry and I haven’t read it in years but the most depressing story I’ve read has to be Valley of the Dolls which follows the lives of 3 women through careers, relationships and addictions. It is a pretty unsettling story which at times is dreadfully sad, you just keep hoping for a happy ending but unfortunately there isn’t one.  Oddly enough though it is still on my favourite books list and if you haven’t read it and like true to life stories and don’t mind unhappy endings I would definitely recommend it. 

So what books do you find upsetting?