Book Series Read Over 70 Years

From childhood to the present time, I have read a number of books in series. Because it is over 70 years clearly my list does include series which were popular when I was a boy and when our children were growing up. These are the books for younger children. I have listed in various lists just over 1000 different books in previous lists on List Challenges that I have read. In reality I have probably read about 3000 books in my life. Many of the books were out of series. I have not listed many specifics because you forget the titles, but you never forget the series.