"Love Story" by Erich Segal
It is a story about two lovers, a rich boy and a poor girl.
The boy's parents disagree for this marriage and disown him for this reason. The married couple leaves the house and starts their life afresh. The boy completes his graduation and finds a nice job for himself. They are not able to have a child, so they try to seek professional help. The boy later finds that his wife is suffering from a disease called 'leukemia'. She gets weaker and weaker as days pass by and ultimately dies. Thereafter, the boy reunites with his family.