The first part of Whirligigs by O. Henry introduces a variety of characters and situations that explore human nature with wit, irony, and emotional depth. Stories like "The World and the Door" and "The Hypotheses of Failure" delve into themes of missed opportunities and unfulfilled potential. "The Ransom of Red Chief" humorously portrays a kidnapping gone hilariously wrong, showcasing O. Henry's mastery of situational comedy. Other tales, such as "Sociology in Serge and Straw" and "Suite Homes and Their Romance," blend humor with social commentary, examining the complexities of relationships and societal norms. This section vividly captures life’s unexpected twists, offering both laughter and poignant reflection.

CHAPTER I. THE WORLD AND THE DOOR
CHAPTER II. THE THEORY AND THE HOUND
CHAPTER III. THE HYPOTHESES OF FAILURE
CHAPTER IV. CALLOWAY’S CODE
CHAPTER V. A MATTER OF MEAN ELEVATION
CHAPTER VI. “GIRL”
CHAPTER VII. SOCIOLOGY IN SERGE AND STRAW
CHAPTER VIII. THE RANSOM OF RED CHIEF
CHAPTER IX. THE MARRY MONTH OF MAY
CHAPTER X. A TECHNICAL ERROR
CHAPTER XI. SUITE HOMES AND THEIR ROMANCE
CHAPTER XII. THE WHIRLIGIG OF LIFE