Journalist Emily Guendelsberger went undercover as a worker at an Amazon warehouse, a call center, and a McDonald's to document how technology has transformed American workplaces into high-pressure environments where workers are monitored constantly and treated as interchangeable parts. At Amazon, she experienced the grueling physical demands of warehouse work, where algorithms track every movement and mandate punishing productivity targets. At the call center, she endured the psychological stress of back-to-back calls, scripted interactions, and performance metrics that treat bathroom breaks as inefficiency. At McDonald's, she encountered workers trapped in scheduling chaos that made planning childcare or second jobs nearly impossible. Guendelsberger combines her personal experiences with research on workplace stress, chronic pain, and the health effects of job insecurity to show how these conditions harm workers physically and psychologically. She traces how management science evolved from treating workers as human beings to treating them as the cheapest and most expendable element of production. The book reveals how technology enables surveillance and control that would have been impossible in earlier eras, creating workplaces optimized for efficiency at tremendous human cost. Guendelsberger's account is both deeply reported journalism and personal narrative, making abstract labor conditions viscerally real while situating individual experiences within broader economic transformations.