In which novel is the concept of "Big Brother" prominently featured?

The novel in which the concept of "Big Brother" is prominently featured is indeed "1984," written by George Orwell. In this dystopian narrative, "Big Brother" represents the Party's surveillance and control over citizens. The phrase "Big Brother is watching you" encapsulates the omnipresent authoritarian rule and the loss of individual freedoms. The character of Big Brother serves as a symbol of oppressive government oversight, indicating a totalitarian regime where privacy is stripped away, and personal autonomy is undermined. Through this central figure, Orwell critiques totalitarianism and explores themes of power, manipulation, and the dangers of losing the ability to think independently. This iconic concept has permeated popular culture and continues to evoke discussions about surveillance and personal freedom.