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In page Beautiful Losers:

"

Cohen wrote most of the novel during two concentrated eight-month periods in 1964 and 1965. He wrote using a typewriter in a house in Hydra while listening to a portable record player, on which he listened to his favourite Ray Charles record, The Genius Sings the Blues. At first he managed only three pages a day, and sometimes wrote only one hour a day. When the novel began to take shape, he worked up to fifteen hours a day, with the help of amphetamines.[3] He later claimed that amphetamine use was a mistake "for depressed people", as coming down was particularly hard. He said it took "ten years to fully recover".[4]