Limitless - Jim Kwik For the last 25 years, Jim Kwik has helped everyone from celebrities to CEOs to students improve their memory, increase their decision-making skills, learn to speed-read, and unleash their superbrains. In Limitless, readers will learn Jim's revolutionary strategies and shortcuts to supercharging their brains, with simple, actionable tools to sharpen the mind, enhance focus, and fast-track their fullest potential.