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Hubert Selby
Hubert "Cubby" Selby Jr. was an American novelist. Two of his books, Last Exit to Brooklyn (1964) and Requiem for a Dream (1978), were adapted into films, both of which he appeared in.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Requiem for a dream
1988
ISBN 9780938410560