March 4th, 1971: Deep in the Colombian rainforest, a motley crew of "psychonauts" prepared for what they believed would be the ultimate experiment. Convinced that a mixture of powerful hallucinogenic plants held the key to unlocking human consciousness, they soon found themselves entering hyperspace.

The return journey was... complicated.

Present day: Acclaimed journalist John O'Connor is fascinated by this forgotten expedition. What really happened in those jungle depths? Armed with decades-old field notes, new interviews, and a healthy dose of curiosity, O'Connor ventures into the same Amazon territory, retracing the psychonauts' steps through the remote Putumayo in search of a legendary hallucinogen called ukuè ―and the truth about an "experiment" that's been quietly gathering dust.

Working alongside indigenous Uitoto people who bore witness to it all, O'Connor explores how humanity's relationship with psychedelics has shaped everything from ancient religion to modern medicine. But as he journeys deeper into both the rainforest and the cosmic dimensions these substances reveal, one question keeps nagging at him:

Were the psychonauts onto something truly profound―or just profoundly stoned?

Available in hardcover