"House of Leaves" is a novel by Mark Z. Danielewski that explores the story of a family living in a house that is larger on the inside than it is on the outside. The narrative is presented through multiple layers, including a documentary film about the house and the experiences of a man named Johnny Truant who discovers the manuscript detailing these events. The book is known for its unconventional format, featuring unusual typography, footnotes, and color-coded text. It delves into themes of reality, perception, and the nature of storytelling, making it a complex and immersive reading experience that challenges traditional narrative structures.