Elon Musk is a biography written by Ashlee Vance where he gets an opportunity to interact and speak directly to Elon about his life and business ventures. 

Elon is one of the founders of Paypal and started a few companies after it's billion dollar sale to eBay. Afterwards he got involved in a few business including: Space X which was an alternative to NASA and Tesla motors which are supplying fully electric cars challenging the oil and automobile industries. He's also a part of Solar City which supplies solar panels to homes.

Elon has failed many times and was seen in the tech world as a failure. Space X has millions of dollars being burned through mistakes almost bankrupting Elon. The biggest thing I got from his story was this:

What sort of impact am I going to make in this world. I need to be inspired to think bigger and create the future I want into reality.