Here’s a helpful blog post draft about and how to find or use its PDFs. How to Find and Use Outstanding Investor Digest PDFs (A Practical Guide) If you’ve spent any time in value investing circles, you’ve probably heard of Outstanding Investor Digest (OID) . For decades, it has been a cult-classic publication featuring interviews, letters, and roundtable discussions with some of the world’s best investors—from Warren Buffett and Seth Klarman to Howard Marks and David Einhorn.