by David Gerrold
Time travel story in the vein of Heinlein’s “All You Zombies” with a closed loop of personhood, wildly changing history, and speculation on what it’d be like. I remember liking this a good deal in 1973 when I first read it, but then, I was 14 and it had sex. Nowadays it’s a light and amusing read, and that’s about all (and the very mild sex scenes make far less of an impression).
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