Мы by Yevgeny Zamyatin

Narrated as the secret journal of a chief engineer in a future, glass-walled metropolis ruled by a mathematically rational State, the book follows his awakening after he falls for a rebellious woman and becomes entangled in a plot against the regime; illicit love, dreams, and clandestine meetings expose the tensions between enforced uniformity, surveillance, and individual imagination, culminating in ruthless suppression and a medical procedure meant to excise dissenting thought, leaving a chilling meditation on freedom, reason, and the cost of conformity.