Robert Heinlein’s 1941 story “By His Bootstraps”
Robert Heinlein’s 1957 novel “The Door Into Summer”
Robert Heinlein’s 1959 story “All You Zombies”
Robert Heinlein’s 1973 novel “Time Enough for Love”
Robert Heinlein’s 1980 novel “The Number of the Beast”
Robert Heinlein’s 1985 novel “The Cat Who Walks Through Walls”

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