Literary critic Christian Lorentzen described the novel as "a counterfactual narrative by a Vietnam veteran, named Eugene Allen about his experience in a therapeutic, psychedelics-based trauma recovery program initiated, in the novel's alternate history, by John F.

"[1] In July 2016, it was longlisted for the 2016 Man Booker Prize.

Hystopia begins with a framing device to the narrative, presented as a manuscript, also titled 'Hystopia, left by Edward Allen, a Vietnam War veteran who has committed suicide.

In this world, a hallucinogenic drug called Tripazoid can trigger a process called "unfolding", which can either help or (more reliably) worsen the PTSD of the Vietnam veterans who take it.

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