provoost on Nostr: I've gotten two of these mails and still do not understand what they're asking me. So ...

I've gotten two of these mails and still do not understand what they're asking me.

So I see three options:
1. they're just bad at explaining; or
2. their lawyers told them to keep it vague; or
3. they're doing malicious compliance and/or lobbying by making it intentionally confusing, so authors and publishers blame the EU

(3) would then help them with other aspects of DSA that are unrelated to books.

If I had to bet it's (1) though - the iBooks department is probably too low on their list of things to spend any attention on, so they don't bother making this compliance step easy to understand.