Hallucinations oliver sacks on amazoncom free shipping on qualifying offers to many people hallucinations imply madness but in fact they are a common part of the human experience these sensory distortions range from the shimmering zigzags of a visual migraine to powerful visions brought on by fever. But oliver sacks looks for the common cause and combines the common experience with the strange making his book hallucinations an oddly immediate and compelling read have you ever wondered why tired and stressed out pilots might see alien spacecraft or where the universal monsters of fairytales come from. Hallucinations publication date 2012 oliver sacks had both a personal and a professional interest in psychedelics these along with his early migraine experiences launched a lifelong investigation into the varieties of hallucinatory experience
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