9 Books Billionaire Humanitarian Bill Gates Thinks Everyone Should Read

While Bill Gates has a schedule that's planned down to the minute, the entrepreneur-turned-billionaire-humanitarian still gobbles up about a book a week.

Aside from a handful of novels, they're mostly nonfiction books covering his and his foundation's broad range of interests. A lot of them are about transforming systems: how nations can intelligently develop, how to lead an organization, and how social change can fruitfully happen.

We went through the last four years of his book criticism to find the ones that he gave glowing reviews and that changed his perspective.