Bad Blood by John Carreyrou

Allison says,

At the age of 19, Elizabeth Holmes founded Theranos, a company poised to completely disrupt the med-tech industry. At its height, Theranos was valued at close to 10 billion dollars. When Carreyrou began pulling back the curtain for an article in The Wall Street Journal, he discovered that higher-ups at Theranos were lying about the technology they were developing, and everything came crashing down.