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“Sunk Costs” is a category for books—both nonfiction and fiction—that examine how past, irrecoverable investments shape and often distort present decisions. It spans behavioral economics and psychology on the sunk cost fallacy and escalation of commitment; business, tech, and public policy case studies of overruns, boondoggles, and failed bets; memoirs and self-help on quitting, pivoting, and cutting losses; and narratives where people or institutions keep doubling down because of time, money, reputation, or love already spent. Together, these works explore why letting go is hard, how to separate sunk costs from future value, and how to make clearer, forward-looking choices.

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