Reddit mentions of Common Sense on Mutual Funds

>I just want to ask for any book recommendation (english o español). Or if you have any information source that you may want to share with us.

I'm afraid that you're going to have to be a bit more specific than this. Do you mean personal finance and investing?

If so, I would probably recommend:

• The Incredible Shrinking Alpha: And What You Can Do to Escape Its Clutches by Larry E. Swedroe
  
  
• The Four Pillars of Investing: Lessons for Building a Winning Portfolio by William J. Bernstein
  
  
• Common Sense on Mutual Funds by John C. Bogle
  
  
• Winning the Loser's Game, 6th edition: Timeless Strategies for Successful Investing by Charles D. Ellis

The Bogleheads investment philosophy videos are about as subdued as you can get.

The Bogleheads list of recommended books is also good.

The thickest and most complex investment books are often about questionable strategies like technical analysis and derivatives trading. They are textbook-sized, but they're not books I'd recommend. Investing in index funds is a pretty straightforward topic and that's not a bad thing.

You might like Common Sense on Mutual Funds by John Bogle or A Random Walk Down Wall Street by Burton Malkiel since they are less sensational.