# Frank Hardy — The Secret of the Old Mill character guide

> Frank Hardy in The Secret of the Old Mill by Franklin W. Dixon.

**Role:** major

**Also known as:** Frank, Paul Blum, Blum

**First appearance:** 0000-i-a-five-dollar-bill

## Who they are

One of the teenage detective brothers, leading the investigation into counterfeit money.

## Links

- HTML: https://www.betterreads.online/discover/the_secret_of_the_old_mill_se/characters/frank_hardy
- Book: https://www.betterreads.online/discover/the_secret_of_the_old_mill_se
- All characters: https://www.betterreads.online/discover/the_secret_of_the_old_mill_se/characters