Common Sense by Jack Bogle
This book is particularly useful for investors who have little or no experience. It gives an in depth analysis of the advantages that index funds have over actively managed mutual funds. While Jack Bogle does have a financial incentive to push forward this point of view as the founder of Vanguard and the first ever index fund, it is hard to find a flaw in the arguments he presents.
Stocks for the Long Run by Jeremy Siegel
This book was written in 1995 and is thus a product of the bull market that ended tragically in the tech crash of the early 2000’s. Nevertheless, Siegel shows with data covering a period of over 200 years that stocks have historically outperformed all other asset classes. He also notes that the longer the time frame you examine, the more likely it is that stocks will outperform other asset classes.
The Intelligent Investor by Benjamin Graham
This book deserves a spot on every investor’s book shelf. It should be read over and over until the pages are worn and spine is breaking open. Graham was the mentor to Warren Buffet and is considered to be the father of value investing. This text, along with his first book Security Analysis (which he coauthored with David Dodd), has often been touted as the investment bible. From investment psychology to fundamental analysis of individual companies, this book has it all.