Margin of Safety: Risk-averse Value Investing Strategies for the Thoughtful Investor by Seth Klarman

https://en.m.wikipedia.org/wiki/Margin_of_Safety_(book)

https://www.amazon.com/Margin-Safety-Risk-Averse-Strategies-...

Somehow, the article fails to mention Margin of Safety, an investment book less than twenty years old, which sells for about $1000:

http://www.amazon.com/Margin-Safety-Risk-Averse-Strategies-T...

Here's a piece on why it's so pricey:

http://www.businessweek.com/magazine/content/06_32/b3996085....

And here's a recent update on Klarman, who is still doing very well.

http://www.nytimes.com/2007/05/13/business/yourmoney/13klar....

In case $1000 is out of your price range, there's a Rapidshare of a scanned .pdf:

http://rapidshare.com/files/126088249/Margin.of.Safety.by.Se...