House of Leaves is the debut novel by American author Mark Z. Danielewski, published in March 2000 by Pantheon Books. A bestseller, it has been translated into a number of languages, and is followed by a companion piece, The Whalestoe Letters.
The format and structure of House of Leaves is unconventional, with unusual page layout and style, making it a prime example of ergodic literature. It contains copious footnotes, many of which contain footnotes themselves, including references to fictional books, films or articles. Some pages contain only a few words or lines of text, arranged in strange ways to mirror the events in the story, often creating both an agoraphobic and a claustrophobic effect. The novel is also distinctive for its multiple narrators, who interact with each other in elaborate and disorienting ways.