""The Little Book of Common Sense Investing"" by John C. Bogle is a book that offers a practical and straightforward guide to investing. Bogle is the founder of Vanguard, one of the largest investment management companies in the world, and his approach to investing emphasizes the importance of keeping things simple and sticking to the basics.

The book is focused on the idea of index investing, which involves investing in a diversified portfolio of low-cost index funds that track the performance of a broad market index. Bogle argues that this approach is the most effective way for individual investors to build wealth over the long-term, and that trying to beat the market through stock picking or market timing is a losing proposition for most people.

Bogle's approach is based on his belief that investing should be a low-cost and low-maintenance endeavor. He argues that high fees and expenses, along with frequent buying and selling of individual stocks, can eat away at your returns and make it difficult to achieve your financial goals.

Instead, Bogle recommends focusing on a few key principles, such as diversification, asset allocation, and periodic rebalancing. By investing in a mix of stocks and bonds that aligns with your risk tolerance and long-term goals, and regularly rebalancing your portfolio to maintain the desired mix, you can create a simple and effective investment strategy that will serve you well over the long-term.

The book also emphasizes the importance of staying disciplined and avoiding the temptation to chase after hot stocks or market trends. Bogle argues that by sticking to a simple and diversified investment strategy, and maintaining a long-term perspective, you can achieve solid returns over time and build lasting wealth.

Overall, ""The Little Book of Common Sense Investing"" is a concise and practical guide to investing that offers valuable insights and advice for anyone looking to build wealth over the long-term. Bogle's emphasis on simplicity, low costs, and discipline make this book an excellent resource for both novice and experienced investors alike.