The 32-year-old millionaire founder of $3.75 billion Box thinks everyone needs to read these two books

Box CEO Aaron Levie may have made his millions helping companies move their data to the cloud, but the 32-year-old founder still takes the time to sit down and read a book.

As the leader of a 1,960-person workforce with $500 million in annual revenue, it's up to Levie to set the tone at Box. So, even though Levie is known widely as the funniest CEO in enterprise tech, it's no surprise that his books of choice are actually quite serious.Speaking on stage at BoxWorks, Box's annual user conference, Levie shared two books he believed that all of its attendees should read and absorb.

Here's what he read:

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