He wrote several collections of short stories that were well-received. His short stories often follow a
Chekhovian pattern. The characters in Trevor's work are typically marginalized members of society: children, the elderly, single middle-aged men and women, or the unhappily married. Those who cannot accept the reality of their lives create their own alternative worlds into which they retreat. A number of the stories use
Gothic elements to explore the nature of evil and its connection to madness. Trevor acknowledged the influence of
James Joyce on his short-story writing, and "the odour of ashpits and old weeds and offal" can be detected in his work, but the overall impression is not of gloominess, since, particularly in his early work, the author's wry humour offers the reader a tragicomic version of the world. He adapted much of his work for stage, television and radio. In 1990,
Fools of Fortune was made into a film directed by
Pat O'Connor, followed by a
1999 film adaptation of ''
Felicia's Journey'', which was directed by
Atom Egoyan. Trevor set his stories in both England and Ireland; they range from black comedies to tales based on Irish history and politics. A common theme is the tension between
Protestant (usually
Church of Ireland) landowners and
Catholic tenants. His early books are peopled by eccentrics who speak in a pedantically formal manner and engage in hilariously comic activities that are recounted by a detached narrative voice. Instead of one central figure, the novels feature several protagonists of equal importance, drawn together by an institutional setting, which acts as a convergence point for their individual stories. The later novels are thematically and technically more complex. The operation of
grace in the world is explored, and several narrative voices are used to view the same events from different angles.
Unreliable narrators and different perspectives reflect the fragmentation and uncertainty of modern life. Trevor also explored the decaying institution of the "Big House" in his novels
Fools of Fortune and
The Story of Lucy Gault. ==Awards and honours==