If you don't know who Jason Calacanis is, you should. He is one of the top angel investors in the United States, and hosts the Launch Fesitval in San Francisco, which has featured numerous startups.
Calacanis has invested in such companies as Tumblr, Uber, Evernote, Robinhood, Thumbtack, and numerous other companies.
His book takes you through all the steps to become wealthy through startups, from evaluating new businesses, determining the risks and rewards, and building upon your angel investor relationships.
If you are interested in making money through startups, I highly recommend the book, Angel.