Box CEO Aaron Levie may have made his millions helping companies move their data to the cloud, but the 33-year-old founder still takes the time to sit down and read a book.

It’s up to Levie, the leader of a 1,960-person workforce at a company that has $500 million in annual revenue and is valued at $3.75 billion, 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 last week at BoxWorks, Box’s annual user conference, Levie shared two books he believes all the attendees should read and absorb.

Read full article: The 33-year-old millionaire founder of $3.75 billion Box thinks everyone needs to read these 2 books