Brexit has been the most significant decision in modern British political history. It was a vote that has had repercussions around the world, not least in the United States. But the money and influence that delivered Brexit was far from the grassroot campaign often depicted in media reports. Democracy for Salespeaks to far more than just the UK’s vote to leave the European Union. Geoghegan documents the rise of dark money on both sides of the Atlantic, showing how dark money has circumvented – and corrupted – democratic mechanism. We hear first-hand from the new generation of political communications gurus who have made data the most priceless commodity in politics, and step inside the transatlantic think tank world, where secret money can buy serious influence. We meet the whistle-blowers and transparency activists fighting against the increasing influence of money in politics and see how easy it is to evade the cash-strapped regulators vainly struggling to police our democracy.