Goodreads Librarians Group discussion

Why has all Dan Carlin's Hardcore History lectures been deleted?

According to
https://help.goodreads.com/s/article/...
they are valid records:

Recorded lectures (such as The Great Courses) with associated ISBNs or ASINs in the following formats …

Dan Carlin’s history lectures have been on Goodreads for many years. The only thing that changed is that they are no longer sold on Amazon. They have ASINs. Now they are sold from https://www.dancarlin.com/hardcore-hi...
Is being sold on Amazon a requirement?

I hope the lectures can be un-deleted.

Thank you

If you can provide the ASINs or ISBNs for them we can look them up. Note that Great Courses were originally not allowed, but that rule changed a few years back.

Here are some of the ASINs. Hard to find, since they are no longer being sold by Amazon.

Punic Nightmares: B0DZ3P4895
Blueprint for Armageddon: B0DTZVBB4M
The Celtic Holocaust: B0DTZPCT9N
History Under The Influence: B0DTXRNYRX
The Destroyer of Worlds: B0DM23NJTZ
Darkness Buries the Bronze Age: B0DTXMKDHW
Thoughts on Churchill: B0DTXCRG4H
Bubonic Nukes: B0DTXJRHNX