Elon Musk seems to be a really cool guy who’s changing the world through smart businesses. He’s been a founder at PayPal, Tesla, and SpaceX; with SpaceX he’ll take humanity to Mars (hopefully).

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“Bloomberg Risk Takers” profiles Elon Musk, the entrepreneur who helped create PayPal, built America’s first viable fully electric car company, started the nation’s biggest solar energy supplier, and may make commercial space travel a reality in our lifetime. And he’s only 40. (Source: Bloomberg)

Here’s a book about Musk and other entrepreneurs: