Faking authenticity Authenticity as intermedial performance in Mark Z. Danielewski’s House of Leaves (2000) and the Teleplays (2019).

The article examines the construction of authenticity as an intermedial performance in Mark Z. Danielewski's novel *House of Leaves* (2000) and its complementary teleplays (2019). It argues that Danielewski employs diverse media forms—such as photojournalism, documentaries, podcasts, and digital formats—to create layered authenticity effects that blur the boundaries between fact and fiction, emphasizing that authenticity is a mediated performance rather than an inherent quality. Drawing on Irina O. Rajewsky's framework of intermediality, the analysis highlights three key strategies in the texts: medial transposition, media combination, and intermedial references, which together expose and reconstruct authenticity through narrative complexity and media hybridity. The article situates *House of Leaves* alongside the literary hoax of the Yasusada poems to illustrate how both works engage with the paradox of authenticity by revealing mediation and artifice while generating immersive, second-order authenticity.