4 stars. This book came recommended to me and it was a very interesting read. Carryrou is an investigative reporter with the Wall Street Journal and he started investigating the multi-billion dollar medical start up Theranos and its CEO and mastermind Elizabeth Holmes and discovered shocking realities. This was a house of cards fronted by this charismatic and secretive woman with a star studded board and a legal team that was feared. He found the story and followed it where it led and ended up bringing down Theranos and the people who ran it, in spite of threats, surveillance, bullying and every attempt to stop him. What amazes me is how many people were taken in by Holmes and how badly she and her partner treated the staff and how long they were able to get away with this, putting people's lives at risk and making a lot of money. A very interesting read about a huge scam.