Mark Z. Danielewski is an American fiction author. He is most widely known for his debut novel House of Leaves (2000), which won the New York Public Library's Young Lions Fiction Award. His second novel, Only Revolutions (2006), was nominated for the National Book Award.

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.