Phil Libin's entrepreneurial career has been driven, in part, by a simple mantra: You have what you need. The five words come from a decidedly surprising source--a wilderness survival guide published 64 years ago.

On Tuesday, the co-founder of Evernote and AI startup incubator All Turtles joined me on the latest episode of Inc.'s Book Smart podcast, where we explore the books beloved by prominent entrepreneurs, founders, and notable figures across the spectrum of industry. As a teenager in the Bronx borough of 1980s New York City, Libin visited his high school's library and happened upon a copy of How to Stay Alive in the Woods: A Complete Guide to Food, Shelter, and Self-Preservation Anywhere, by wilderness survivalist and author Bradford Angier.

Intrigued by the title, he picked it up--and quickly immersed himself in the book's hypothetical scenarios. Now, in retrospect, Libin notes that most of the survival tactics are outdated or downright wrong. Yet the copy in his home office today is well-worn. "It instilled these values, these lessons, this mindset in me that I've come back to and expanded on lots of times," he says. That includes other Zen-like mantras from the book like "the best solutions are the simple ones," "stay calm," and "find moments of joy."

To learn how Libin has applied those lessons as a serial entrepreneur and investor, listen in the player below, or wherever you get your podcasts--and check out our archive of previous episodes. If you like what you hear, subscribe to Book Smart and leave us a review