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* Set in Hainish universe; Hain had seeded various planets, including Terra (Earth) and Gethen (Winter)
* Protagonist is Genly Ai, a Terran male, on a mission to get Gethen to (re)join a new League of All Worlds called the Ekumen
* Gethen’s inhabitants are ambisexual- their sex and sexuality is gender-neutral for 24 days, then for the last two days of the lunar cycle, during *kemmer,* they become alternately sexually male or female, with no predisposition for either
* Over the course of the book, Ai realizes that his mistrust of Estraven, the disgraced Gethen prime minister, is misplaced, maybe misogynist
* Ai teaches Estraven to mindspeak; Estraven sacrifices himself; Gethen joins the Ekumen
* Le Guin wins both the Hugo and the Nebula, first woman to do so; *The Left Hand of Darkness* widely regarded as first feminist sci-fi
* New possibilities; Ai doesn't gain power or triumph; just evolves morally and becomes a more decent human being
* Gains (then loses) the friend he underestimated from the beginning, the one who made everything possible (Estraven is a metaphor for women)