[WolfeReader]

Selling books doesn't require DRM at all. I buy DRM-free books all the time.

As an example: Kobo will tell you, at the bottom of each book's page, if it has DRM or not. And it will happily sell you a book without DRM and let you download it.

[themadturk]

"Selling" doesn't require DRM; publishers require DRM. So not every book you want to buy or can buy is available without DRM. Not even authors especially want DRM. Kobo will only let you buy a book without DRM if the publisher makes it available that way.

[WolfeReader]

If you say "publishers require DRM" and then say that publishers sometimes sell books without DRM, you might need to review the definition of the word "require".

Some publishers require DRM. Which is entirely different than the false claim made earlier that "selling ebooks necessarily requires DRM".

[themadturk]

When DRM is used, it is because publishers have required it, not because booksellers require it. Is that a better way of putting it?

[WolfeReader]

It's a completely different statement, so yes.