In a Glass Darkly, published in 1872, is a collection of five eerie tales by Irish writer J. Sheridan Le Fanu. Framed as case studies by the occult detective Dr. Hesselius, the stories blend psychological horror with the supernatural. Notable tales include “Green Tea,” “The Familiar,” and the groundbreaking vampire novella “Carmilla.” Le Fanu’s subtle style, gothic atmosphere, and exploration of repressed fears helped shape modern horror and ghost stories. The collection remains a landmark in 19th-century supernatural fiction.