Digital explosion: why is it happening, and what is at stake? -- Naked in the sunlight: privacy lost, privacy abandoned -- Ghosts in the machine: secrets and surprises of electronic documents -- Needles in the haystack: Google and other brokers in the bits bazaar -- Secret bits: how codes became unbreakable -- Balance toppled: who owns the bits? -- You can't say that on the Internet: guarding the frontiers of digital expression -- Bits in the air: old metaphors, new technologies, and free speech.