The Yage Letters Redux is a collaborative work between Beat Generation luminaries William S. Burroughs and Allen Ginsberg. Initially published in 1963, this updated edition includes additional material, offering a more comprehensive look at the authors' quest for "yage" (ayahuasca), a powerful hallucinogenic plant used in Amazonian shamanic rituals.

The book documents Burroughs' travels in the 1950s to South America in search of yage, which he believed could unlock telepathic abilities and higher states of consciousness. Written in an epistolary style, the letters exchange insights, revelations, and vivid descriptions of the people, places, and experiences they encountered.

This revised version includes Ginsberg’s reflections on his own experiments with psychedelics and their cultural implications, providing a richer perspective on the transformative and sometimes harrowing experiences associated with yage.