Mark Cuban, billionaire technology entrepreneur and investor on ABC's "Shark Tank," is an avid reader: He's picked up everything from classics like "The Fountainhead" by Ayn Rand, to computer manuals, to the recent publication of billionaire Ray Dalio's "Principles: Life & Work."
For Cuban, it's a way to stay sharp.
CNBC Make It asked Cuban what he'll be reading this summer. Unsurprisingly, he isn't planning to spend time reading lighthearted novels. Cuban revealed his five selections, which range from psychology to mathematics.