Fascinating and compelling narrative about a data scientist/political worker who was one of the brains behind Cambridge Analytica and its data-sweeping efforts to map and influence every American and British voter using Facebook data, psychological tests posing as games, and other off-the-shelf data. Especially interesting is the way CA was set up through shell companies as a quasi-legal US version of its parent company, SCL, so it could legally influence US elections. Bannon is a major player as are the Mercers and a Russian oil company - and it's all very alarming. I thought the author did an excellent job of explaining both the technical and political aspects of the company. The CEO, Alexander Nix, is quite a character - one the author obviously found a loathsome combination of talented salesmanship, ostentation, and ineptitude. Though he addresses how he got swept into working against democracy (the intellectual challenge was exciting, some of his colleagues were smart and creative, and they were doing something new - kind of like the excuses physicists who regretted working on the atomic bomb made) it's still a bit of a mystery how a centrist-to-left political operative would cooperate with Brexit and far-right Republican campaigns.