Good journalistic history of psychedelics. Highly relatable. Approached from a modern perspective, walking the tightrope psychedelics walk between science and the metaphysics of subjective experience, including religious experience, consciousness expansion, and the nature of reality, without losing the audience. Though it's been a few years since it was published, How to Change Your Mind was well worth my ten hours (not that my audio book player is on 1x speed, actually).