Since we're often asked what books we found most useful or interesting, we've listed our favorites below. 
Click on the title to buy them on Amazon. 

Investing
One Up on Wall Street and Beating the Street by Peter Lynch. 
The Money Masters and New Money Masters by John Train. 
Common Stocks and Uncommon Profits by Philip A. Fisher
Market Wizards, New Market Wizards, Hedge Fund Market Wizards, and Stock Market Wizards by Jack Schwager. 
When Genius Failed by Roger Lowenstein
On Investing by John Neff (skip the first 50 or so pages)
Winning Poker for the Serious Player by Edwin Silberstang
The Tipping Point by Malcolm Gladwell

Wall Street/Financial History
The New Crowd by Judith Ramsey Ehrlich & Barry J. Rehfeld
The Big Short by Michael Lewis
Reminiscences of a Stock Operator by Edwin Lefevre
The Quants by Scott Patterson
The House of Medici, Its Rise and Fall by Christopher Hibbert

Movies
Margin Call
Too Big to Fail
Wall Street (1987 version)

General Business
Seven Days in the Art World by Sarah Thornton
The Art of War by Sun Tzu
Non-Zero by Robert Wright
Losing my Virginity by Richard Branson
The Four Hour Workweek by Tim Ferriss