It’s a Librivox recording.
* All Librivox recordings are in the public domain.
* Meaning, the original book had to be in the public domain before it was recorded as an audiobook.
* Meaning it had to be written before 1929.
I’m a big fan of Librivox and the people who record the audiobooks. Lots of work, no financial payback.
Before Disney got involved and started bribing congress to keep pushing back the copyright date, the copyright length was 56 years (28 years + a 2nd 28 if you renewed the copyright, which didn’t happen for many works, because they made no money).
Imagine if everything prior to 1968 was in the public domain. Movies, music, books. How different would our cultural landscape be.
We lived with the 56 year rule (28 + 28 renewal) for generations. Then Disney decided they couldn’t lose Mickey Mouse to public domain.
FWIW, there are two of us here who record at Librivox. I do so myself, so does another FReeper rlmorel.
Speaking of the 60’s, you might find this of some use:
New audiobook release: America’s Retreat from Victory; The Story of George Catlett Marshall, by Sen. Joe McCarthy
https://freerepublic.com/focus/f-chat/4217078/posts
You will find dozens of open source audio books under the key word FReeperBookClub
https://freerepublic.com/tag/freeperbookclub/index?tab=articles
1929 is a general rule, but it has its exceptions. I found a Friedrich Hayek book and since had it created as an audio book too.