The Little Book of Common Sense Investing by John C. Bogle

This book has one core message: stop overcomplicating investing.

John Bogle, the guy who basically invented index funds, argues that the smartest thing most people can do is buy a simple, low-cost index fund (like one that tracks the S&P 500) and just… leave it alone.

No trying to pick winning stocks. No chasing hot trends. No paying expensive fund managers. Just steady, boring, long-term investing — and it works.

The book explains why most active investors actually lose money trying to beat the market, while index fund investors quietly build real wealth over time. Even Warren Buffett agrees with this approach.

This 10th anniversary edition adds new chapters on how to split your investments wisely and how to invest specifically for retirement.

The bottom line: Keep it simple, keep costs low, be patient, and let time do the heavy lifting. That’s the whole secret.