https://www.amazon.com/Bad-Blood-Secrets-Silicon-Startup/dp/152473165X/ref=mp_s_a_1_3?ie=UTF8&qid=1529349440&sr=8-3&pi=AC_SX236_SY340_QL65&keywords=Bad+blood ht

https://www.amazon.com/Bad-Blood-Secrets-Silicon-Startup/dp/152473165X/ref=mp_s_a_1_3?ie=UTF8&qid=1529349440&sr=8-3&pi=AC_SX236_SY340_QL65&keywords=Bad+blood https://www.amazon.com/Bad-Blood-Secrets-Silicon-Startup/dp/... One chapter talks about Mattis, including various emails that were sent. He comes across as genuinely wanting to do the best thing for his men and hoping that Theranos could save lives in the field. There never were any field tests, because Mattis listened to his underlings when they said it would need to get FDA approval first. They then offered to let Theranos test random blood samples to validate the results but Theranos never took them up on that offer.