O. Henry was an American writer of short stories in the late 19th and early 20th centuries. His specialty was creating stories with unexpected plot twists and ironic endings. This is reflected in the crossword solutions for the term O. Henry Specialty: IRONY, TWIST, plot twists, short story, and tell a story. IRONY is a literary device that involves a contrast between what is expected and what actually occurs. A TWIST is an unexpected turn of events in a story. Plot twists are sudden changes in the direction of a story. Short story is a genre of literature that typically involves a single narrative arc and is shorter than a novel. Tell a story is an expression used to encourage someone to share a narrative.