Immersing themselves in a good book

10 Ways Retirees Spend Their Newfound Free Time

"Reading. Retirees are more likely to immerse themselves in a good book than any other age group. They spend about an hour each day turning pages, about three times as much time as the typical person spends reading."

The problem is that the size of the letters(or characters) in many of the published books is too small to read. If you publish books with larger-size print, or in larger-size letters, you will make a profit.