The historic quest to rekindle the human exploration and colonization of space led by two rivals and their vast fortunes, egos, and visions of space as the next entrepreneurial frontierThe Space Baronsis the story of a group of billionaire entrepreneurs who are pouring their fortunes into the epic resurrection of the American space program. Nearly a half-century after Neil Armstrong walked on the moon, these Space Barons-most notably Elon Musk and Jeff Bezos, along with Richard Branson and Paul Allen-are using Silicon Valley-style innovation to dramatically lower the cost of space travel, and send humans even further than NASA has gone. These entrepreneurs have founded some of the biggest brands in the world-Amazon, Microsoft, Virgin, Tesla, PayPal-and upended industry after industry. Now they are pursuing the biggest disruption of all: space.Based on years of reporting and exclusive interviews with all four billionaires, this authoritative...