Katabasis: Deluxe Limited Edition is a dark academia fantasy novel by R.F. Kuang, the #1 New York Times and Sunday Times bestselling author of the Poppy War trilogy, Babel: An Arcane History, and Yellowface. Published by Harper Voyager on August 26, 2025, this 560-page hardcover has been described as Dante's Inferno meets Susanna Clarke's Piranesi.

In the novel, two Cambridge graduate students—Alice Law and her relentless rival Peter Murdoch—must set aside their bitter academic rivalry when their beloved professor dies in a magical accident. Armed with chalk for spell-casting and guided only by the classical tales of Orpheus and Dante, they descend into a Hell that defies every literary expectation, confronting demons, their own ambitions, and the true cost of knowledge along the way.

This collector's Deluxe Limited Edition, available only on the first printing while supplies last, features stenciled page edges, case effects, and illustrated endpapers. R.F. Kuang's work has won the Nebula, Locus, Crawford, and British Book Awards.