The CEO Test is the authoritative, no-nonsense insider's guide to navigating leadership's toughest challenges, brought to you by authors uniquely qualified to tell the stories. Adam Bryant has conducted in-depth interviews with more than 600 CEOs. Kevin Sharer spent more than two decades as president and then CEO of Amgen, where he led its expansion from $1 billion in annual revenues to nearly $16 billion. He has served on many boards and is a sought-after mentor for CEOs of global companies.