Tower Of Babylon by Ted Chiang

In an ancient world where the sky is a solid dome above a flat earth, a young miner joins a generations-long effort to build a colossal tower to reach and chisel through the vault of heaven. As he climbs through self-sustaining cities and perilous worksites, he confronts the limits of human ambition and the literal nature of mythic cosmology. The final breakthrough triggers an unexpected journey that loops him back to the world below, reframing creation as a self-contained whole and redefining humanity’s place within it.

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