A book that makes you cry.
I try to avoid them. If I can. I've bawled through the past 2-3 years through a lot of non-fiction about the Great War. I cried up to near suffocation over
"Testament of Youth" by Vera Brittain.
A recently read m/m one over which I cried copiously was
"Junction X" by Erastes.
A story which makes me cry just thinking of it is
"Kholstomer" by Leo Tolstoy.
But as I said, I try hard to avoid tearjerkers. I tend to hate them quite passionately.