Book cover: Bad Blood

Bad Blood

Secrets and Lies in a Silicon Valley Startup

John Carreyrou

A billion dollars raised on a machine that never worked, and the reporting that finally broke it.

Carreyrou was the Wall Street Journal reporter who broke Theranos, and this is the account written from the inside of that investigation. Elizabeth Holmes raised nearly a billion dollars on a machine that would run hundreds of tests from one drop of blood; the machine did not work. The board included Kissinger and Shultz. What makes it grip is the intimidation: the lawyers, the surveillance, the employees who spoke anyway.

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Jeffrey Archer

Novelist

Bad Blood is the book you hand to anyone who tells you ‘Surely someone would have spotted it?’ Elizabeth Holmes convinced some of the most powerful people in America that she had invented a machine that could run hundreds of medical tests from a single drop of blood. She hadn’t. The machine didn’t work. And by the time the truth emerged, she had raised nearly a billion dollars.

Interview · July 2026

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