"House of Leaves" is a unique and complex novel written by Mark Z. Danielewski. It's often categorized as a postmodern horror story due to its unconventional narrative structure and eerie atmosphere.What makes "House of Leaves" stand out is its unconventional formatting. The text is full of footnotes, colored text, and typographical manipulations that add layers of meaning and complexity to the story. The book plays with the idea of perception, reality, and the unknown, making it a fascinating and challenging read for those interested in experimental literature and psychological horror.