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O. Henry
O. Henry's short stories are well known for their wit, wordplay, warm characterization and clever twist endings. ([Source][1].) [1]: http://en.wikipedia.org/wiki/O._Henry
The Gift of the Magi and Other Short Stories
This collection gathers sixteen short stories by O. Henry, the pen name of American writer William Sydney Porter, known for his twist endings and warm portrayals of ordinary people. The title story follows Della and Jim, a young married couple with little money, who each sell their most prized possession to buy the other a Christmas gift, only to discover that the gifts no longer serve their intended purpose. The collection showcases O. Henry's blend of humor, sentiment, and irony across stories originally published in the early 1900s.
Sells her hair to buy her husband a Christmas gift.
Sells his watch to buy his wife a Christmas gift.