Hercule Poirot decides to cap his illustrious career by solving twelve final cases, each meticulously chosen to mirror the legendary labours of his Greek namesake. Facing the prospect of retirement, the fastidious detective seeks a grand finale that tests his deductive prowess against a variety of criminal puzzles. He encounters a diverse array of adversaries, ranging from cunning thieves to cold-blooded murderers, while navigating the social complexities of mid-century England. The narrative unfolds as a series of distinct, self-contained investigations, each framed by Poirot's intellectual comparison to the ancient hero's trials.

This collection is widely regarded as a clever homage to classical literature, showcasing Christie's ability to adapt ancient archetypes into the framework of the traditional whodunit. Readers often appreciate the variety of the cases, which allow Poirot to demonstrate his versatility across different social strata and criminal motivations. The structural conceit provides a satisfying sense of closure for the character, marking a significant milestone in the long-running series. Critics frequently highlight the wit and precision of the prose, noting that the stories maintain the high standards of the author's earlier works.