The Circle, Dave Eggers’ new novel about an increasingly totalitarian social networking corporation, won’t hit shelves until next Tuesday. But the work of “pure speculative fiction,” which was excerpted on the cover of last week’s New York Times magazine, has already earned adulation from fans in high places (the Wall Street Journal called Eggers a modern-day muckraking Upton Sinclair) and accusations from critics on the margins—in particular Kate Losse, former ghostwriter to Mark Zuckerberg, who says Eggers ripped off her 2012 Facebook tell-all, The Boy Kings.