O. Henry 
The Gift of the Magi 

The story tells of a young husband and wife and how they deal with the challenge of buying secret Christmas gifts for each other with very little money. As a sentimental story with a moral lesson about gift-giving, it has been popular for adaptation, especially for presentation at Christmas time. The plot and its twist ending are well known; the ending is generally considered an example of comic irony.
O. Henry's short stories are well known for their wit, wordplay, warm characterization and clever twist endings. 

O autorze

William Sydney Porter (September 11, 1862 – June 5, 1910), better known by his pen name O. Henry, was an American writer known primarily for his short stories, though he also wrote poetry and non-fiction.