Peter Lynch's One Up on Wall Street shows how to categorize companies based on their markets and business approaches. There are great bargains within each category. Lynch tends to prefer small companies poised for big growth. His emphasis on investing in what you know is essential to repeatable success. Lynch is arguably the source for the phrase "tenbagger stock".

Joe Ponzio's F Wall Street explains why expensive money managers aren't looking out for your best interests. Ponzio's strategy is a straightforward way to find bargain stocks. There's some high-school math. His approach is sound and his advice on safety and philosophy is excellent.

Mary Buffett's Buffettology is a book with two parts. The first explores the investing perspective of Warren Buffett. It analyzes his philosophy from several angles to explain how he approaches stocks and opportunities. The second part gets into the numbers by applying that philosophy to real companies. It's a great way to understand real investing, and it's full of insights (especially where Buffett disagrees with value investing pioneer Benjamin Graham).

John Bogle's The Little Book of Common Sense Investing explains why mutual funds won't beat the market, why index funds are here to stay, and why the costs you pay financial advisers and fund managers and everyone else will ruin your possibility for getting a great return on your investment!

Benjamin Graham's The Intelligent Investor is the classic book on value investing. It's older and more advanced than the other books on this list, and it remains one of the best ways to understand your investments. This isn't the first to read of all of the investing books, but it's the most serious of all books on investing.