Psychedelic drugs are said to lead to expanded consciousness Jorm Sangsorn/iStockphoto/Get​ty Images
Christof Koch (Hachette UK; Basic Books (US))
A FEW weeks ago, during a journey on the Eurostar, I started reading a new book about consciousness. I had barely begun when the man sitting opposite asked about it. He told me – a consequence perhaps of the unique way that train travel can create short yet oddly close friendships – that, after a near-death experience, he became interested in the mind.
He asked if I knew what consciousness was, and I said I…
