2001: A Space Odyssey by Arthur C. Clarke

You are hurtling across the abyss of space on an expedition to unexplored planets. Your only companion is a fellow astronaut: the three hibernauts who lie in a deep-freeze sleep will not be awakened until their skills are needed. An essential member of your crew is Hal, the electronic, almost-human brain that ceaselessly guides your course. For months your craft has been carrying you away from Earth at a hundred thousand miles an hour. You are now farther from home than any man in history. 

New American Library 1968 hardcover Book Club Edition in decent condition, see photos.