His Twitter account @GSElevator, through which John LeFevre sent alleged snippets of conversations from the Goldman Sachs elevators into the world, not only has three-quarters of a million followers but even triggered an internal investigation at Goldman. It went so far that the bank prohibited employees from talking to each other in the elevator. However, although it is now clear that LeFevre did not work for Goldman Sachs but for Citigroup, his book offers a shocking yet amusing glimpse behind the curtain of a world that is both passionately hated and adored. Because it is all true: alcohol, cocaine, and prostitutes are more the norm than the exception at investment banks, camaraderie during major deals is completely normal, and what goes on behind the glittering facades of the world's largest banks is simply shocking - and yet real. The incredible report.