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"Proof-of-Work" as a book category centers on the idea that value, identity, or victory must be earned through effort, endurance, or demonstrable achievement. Stories in this genre foreground trials—apprenticeships, survival ordeals, competitive quests, intricate puzzles, or systemized challenges—where characters (or even readers) must undertake repetitive, skilled, or creative labor to prove themselves or unlock rewards. The tone can range from gritty realist tales of toil and moral testing to speculative or techno-thrillers that literalize verification through cryptographic or bureaucratic systems; structurally these books often emphasize milestones, rule-bound processes, and the ethics of work and recognition. Readers can expect narratives that reward patience and attention, celebrating craft, resilience, and the meaning of merit earned rather than given.

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