In 2013, twenty-five-year-old Anna Wiener decides to leave her precarious job as an editorial assistant at a literary agency in New York for the seductive promises of burgeoning tech startups. An adventure that will lead her to move to San Francisco and sign for a new data analysis company. In the effervescent microworld of Silicon Valley, she will rub shoulders with young and enthusiastic entrepreneurs immersed in a feverish race to innovation, wealth and, of course, power. With singular lucidity, Anna Wiener reveals the dark face of Silicon Valley – the false ideals, the endless hours, the alienating corporatism, the endemic misogyny – and walks the fine line between utopia and dystopia in which some technological emporiums operate that seek to change radically changing the world but endangering our societies: from the inexorable control that apps and networks exercise over us, to the brutal inequality that has disfigured the hallmarks of its epicenter, the city of San Francisco. An exceptional chronicle, which reads like a novel, about an all-powerful industry and the people who make it up, which has placed its author as one of the essential voices to decipher this vertiginous digital age.