This phrase refers to a suspenseful narrative device, frequently employed in thrillers and horror literature. It creates a sense of immediate danger and unease by suggesting the presence of an unseen threat in close proximity to the protagonist, often unknown to them. A typical scenario might involve a character searching a darkened house while the reader is aware the antagonist lurks just around the corner.
This literary technique is highly effective in building tension and suspense. It plays upon primal fears of the unknown and the vulnerability of being stalked. By granting the reader information the character lacks, the narrative creates dramatic irony, heightening the emotional impact and fostering a sense of anticipatory dread. Its historical roots can be traced to gothic literature and early suspense novels, reflecting a persistent human fascination with fear and the unseen.