James revolutionized ghost fiction by setting his stories in contemporary times rather than the gothic past, typically featuring quiet English villages, cathedral towns, and scholarly protagonists who inadvertently unleash supernatural forces through their antiquarian pursuits. His tales emphasize atmosphere, understated horror, and creeping dread over gore.
His major collections include Ghost Stories of an Antiquary (1904), More Ghost Stories of an Antiquary (1911), A Thin Ghost and Others (1919), and A Warning to the Curious and Other Ghost Stories (1925). Among his most celebrated stories are "Oh, Whistle, and I'll Come to You, My Lad," "The Mezzotint," "Canon Alberic's Scrap-Book," "Casting the Runes," and "A Warning to the Curious," which remain classics of supernatural literature.