When you think of crime fiction, one name rises above them all—Agatha Christie. Known as the “Queen of Crime,” she transformed the detective novel into an art form, weaving intricate puzzles that captivated millions. But Christie’s genius didn’t appear overnight. Her life and imagination were inseparable from the stories she created, each book a stepping stone in her journey as a writer. Let’s walk through some of her most unforgettable works, in the order that shaped her rise.
The Mysterious Affair at Styles

In 1920, Agatha Christie made her grand entrance into the world of detective fiction with The Mysterious Affair at Styles. It was here that readers first met the fastidious Belgian detective Hercule Poirot, whose little grey cells would soon become legendary. The story unravels the poisoning of an elderly heiress, set against the backdrop of an English country estate. Christie, drawing on her knowledge of poisons from her time volunteering in hospital dispensaries during World War I, crafted a debut that was as authentic as it was ingenious. This book didn’t just introduce Poirot—it introduced the world to Christie’s meticulous plotting and her flair for surprise endings.
Read Book: The Mysterious Affair at Styles!The Murder of Roger Ackroyd

By 1926, Christie was already gaining recognition, but The Murder of Roger Ackroyd pushed her into the spotlight—and stirred controversy. The novel features one of the most shocking twists in detective fiction history, where the narrator himself is revealed as the murderer. Critics debated whether it was fair play; readers were stunned by the audacity. At the same time, Christie’s personal life was in turmoil. That same year, she famously disappeared for eleven days, sparking nationwide headlines. While the real-life mystery of her disappearance remains unsolved, her fictional one in Ackroyd cemented her as a daring innovator unafraid to break the rules of her genre.
Get Book: The Murder of Roger Ackroyd!The Mystery of the Blue Train

After the storm, Christie sought to steady her career, and in 1928 she published The Mystery of the Blue Train. Set against the luxury and glamour of continental Europe, the novel follows Poirot as he investigates the brutal murder of a wealthy American heiress aboard the famed Blue Train to the Riviera. Though Christie herself later confessed she was dissatisfied with the book, it reflects her own travels and growing independence after her divorce. The story may not be her favorite, but it showcased her ability to weave intrigue with the allure of high society, turning ordinary journeys into unforgettable crime scenes.
Get Book: The Mystery of the Blue Train!Murder on the Orient Express

If The Blue Train hinted at Christie’s fascination with railway settings, Murder on the Orient Express (1934) perfected it. Inspired by her own travels on the Orient Express and her archaeological expeditions in the Middle East with her second husband, Max Mallowan, this masterpiece combined exotic locales with a near-impossible puzzle. When an American passenger is found stabbed to death in his locked compartment, every traveler on the train becomes a suspect. Poirot’s solution—revealing that all twelve passengers took part in the murder—was nothing short of revolutionary. The book remains one of Christie’s most famous, proving her unrivaled talent for bending conventions while keeping readers utterly enthralled.
Get Book: Murder on the Orient Express!Closing Thoughts
Agatha Christie’s life was as full of twists as her novels—marked by personal struggles, bold travels, and relentless creativity. From the quiet beginnings of The Mysterious Affair at Styles to the dazzling brilliance of Murder on the Orient Express, her stories not only entertained but redefined detective fiction. Each book carried a piece of her journey, from war-time nursing to scandalous disappearances to cosmopolitan adventures.
Today, her works continue to outsell nearly every author in history, second only to the Bible and Shakespeare. And maybe that’s the final mystery she leaves us with: how one woman, with her pen and her imagination, could capture the world so completely.