One day in 1964, Nicholas Sand, a Brooklyn-born son of a spy for the Soviet Union, took his first acid trip. He had been fascinated by psychedelic drugs since reading about them as a student at Brooklyn College and had experimented with mescaline and peyote. Now, at a retreat run by friends in Putnam County, N.Y., he took his first dose of LSD, still legal at the time.

Sitting naked in the lotus position, before a crackling fire, he surrendered to the experience. A sensation of peace and joy washed over him. Then he felt himself transported to the far reaches of the cosmos.

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