Bad Blood: Secrets and Lies in a Silicon Valley Startup is a nonfiction book by journalist John Carreyrou, released May 21, 2018. It covers the rise and fall of Theranos, the multibillion-dollar biotech startup headed by Elizabeth Holmes.[1] The book received critical acclaim, winning the 2018 Financial Times and McKinsey Business Book of the Year Award.

In 2018 a film version was in production starring Jennifer Lawrence, written by Vanessa Taylor and directed by Adam McKay.