Theranos claimed to have developed technology that could run hundreds of medical tests from a single drop of blood. Elizabeth Holmes founded the company at 19, raised hundreds of millions of dollars, and was featured on the covers of Forbes and Fortune. The company reached a $9 billion valuation. The problem: the technology never worked.
Carreyrou reconstructs how Holmes maintained the deception for over a decade. Theranos devices produced inaccurate results. When the machines failed, employees secretly ran samples on conventional analyzers from other companies. Holmes and her partner Sunny Balwani silenced whistleblowers with legal threats and NDAs. Board members, who included Henry Kissinger and George Shultz, lent credibility without understanding the science. Investors performed due diligence that somehow missed the fact that the core product did not function.
The book is structured chronologically, following the company from its founding through the Wall Street Journal investigation that brought it down. Carreyrou’s reporting is detailed: specific meetings, specific lies, specific moments when employees realized something was wrong and either spoke up (and were punished) or stayed quiet (and lived with it).
The story raises uncomfortable questions for the startup ecosystem. Holmes operated within a system that rewards confidence, discourages skepticism, and treats “fake it till you make it” as legitimate strategy. The same traits that made her convincing to investors (certainty, vision, refusal to accept no) were the traits that enabled the fraud.
For founders, Bad Blood is a cautionary tale about the line between ambition and dishonesty, between selling a vision and selling a lie. It is also a reminder that the people most vulnerable to fraud are often the most sophisticated, because they assume their own judgment is reliable.
Bill Gates has recommended it. At about 340 pages, the book reads like a page-turner. Carreyrou’s journalistic style is clean and controlled, letting the facts carry the weight without editorializing. It won numerous awards and was adapted into a Hulu series and a documentary.
