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In February 2014, Satya Nadella became the third CEO of Microsoft . Nadella, more soft-spoken than his predecessors, Bill Gates and Steve Ballmer, assumed the company's helm amid one of its stormiest chapters. Ballmer, toward the end of his 14-year tenure, had purchased Nokia's mobile phone business at great cost ($7.2 billion) but failed to make a dent in the market dominance of Apple and Samsung . Nadella quickly nixed those ambitions and instead ramped up investment in artificial intelligence and commercial cloud computing. The result has been a remarkable turnaround, featuring major growth in cloud services revenue, a doubling of year-on-year profits and an all-time stock price high. In his new book, Hit Refresh: The Quest to Rediscover Microsoft's Soul and Imagine a Better Future for Everyone (released September 26), Nadella, 50, explains this corporate transformation, lays out his hopeful vision for technological progress and recounts his own rich personal history.

Satya Nadella, the Microsoft CEO who kept the company relevant as its primary PC software business faded, could write a book about the challenges he faced. And he has ... but it's not a tell-all memoir. Instead, Nadella, who has worked at the company since the early 1990s, has positioned himself as the embodiment of the story Microsoft wants to tell about its transformation into a forward-thinking outfit focused on artificial intelligence, cloud software, virtual worlds and quantum computing. "Microsoft is known for rallying the troops with competitive fire," Nadella writes in "Hit Refresh," his new autobiography. "The press loves that, but it's not me."

Immigration can be a controversial topic. We all want safe, secure borders and a dynamic economy, and people of goodwill can have legitimate disagreements about how to fix our immigration system so that everybody plays by the rules. But that's not what the action that the White House took today is about. This is about young people who grew up in America – kids who study in our schools, young adults who are starting careers, patriots who pledge allegiance to our flag. These Dreamers are Americans in their hearts, in their minds, in every single way but one: on paper. They were brought to this country by their parents, sometimes even as infants.