Don Yacktman: Measuring Your Money Manager

Legacy of Benjamin Graham

Charlie Munger & Warren Buffett's Secrets To Investing Success by Monish Pabrai

William Ackman: Everything You Need to Know About Finance and Investing in Under an Hour

2007 MIT Remarks by Seth A. Klarman

Great text by Seth Klarmann. A smaller, more concise edition of "Margin Of Safety" in the begginings of the financial crisis.

Link

Jean-Marie Eveillard on Investors’ Biggest Mistake

Michael Porters’ Five Forces Examined

About this theme I would also recommend the book "Competition Demystified - A radically simplified approach to business strategy" from Bruce Greenwald.