The letter, addressed to publishers and distribution managers, was released just days before the start of the Independent Bookstores Week.
Ute Hentschel, together with 25 fellow independent booksellers, warns of a “growing disadvantage” faced by small retailers in the book trade.
In the open letter, the group argues that reliability should not become a competitive liability for independent shops, urging industry partners to ensure fair treatment.
The letter was shared publicly on social media and a copy was provided to Börsenblatt for publication.