1960's Book Series Trivia

Anybody remember who wrote the Hardy Boy's series? Chip Hilton? Tom Swift? Frank Merriwell?

I loved reading those books. I could finish books in those series in less than two days when I was 9 or 10 years old. The characters in the book served as role models for this young boy whose father died when I was seven.

Those books spurred my love of reading that continues to this day.