Rick Ferri is a leading Boglehead and Serious Money was his first publication and propelled him forward as a popular author in the Boglehead community. 20 years later, this book sounds so simple and so common sense that it is hard to comprehend (as a millennial) how this message could be so controversial and countercultural.
Since it is twenty years old, it does not work well as an investing blue print today. Most investors would be best served by index ETFs rather than mutual funds and buying bond ETFs rather than individual issues. But Ferri himself recognizes that and came out with new and updated books in the intervening years that address the creation of ETFs. The value of this book, especially to me as a millennial, is the vivid picture it paints of how bad the investing world was for the average American in the 1990s. Jack Bogle, Vanguard, and the Bogleheads have literally changed the shape of the industry in 20 years by lowering fees, reducing volatility, and giving time back to investors.