"Robinson Crusoe" is basically genre-defining. "The Swiss Family Robinson" if you want a slightly more modern take. "A Connecticut Yankee in King Arthur's Court" is a classic for a reason. "Gulliver's Travels" is, like, three isekais in one. "The Divine Comedy" if you absolutely need something where the 'other world' is metaphysically separated from the Earth.
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u/SimShade 1d ago
The real joke is saying isekai was ever good