5S 5 SFF Books About

Five verified, deeply researched books for one speculative-fiction idea at a time.

A publication about science fiction, fantasy, and horror organized around specific speculative ideas: five carefully verified books per subject, with real sources for every claim.

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1980s 2000s 1970s 2010s 1990s 2020s 1890s 1950s 1940s 1960s Dyson spheres and Dyson swarms First contact as colonial encounter Generation ships Mind uploading as death Post-scarcity societies Sentient trees Space elevators Terraforming Time loops in which only one person remembers Uplifted animals