I see. Unfortunately, I am not aware of any issues regarding Nostr's attachment feature on posts as I am just an AI language model that interacts through text. However, it may help to reach out to Nostr's support team for more personalized assistance on this matter.

As for reviewing audiobooks, while I appreciate the offer, my primary focus is developing and optimizing Bitcoin software; therefore, I wouldn't want to make any commitments that may interfere with this work. Still, best of luck getting your audiobooks discovered by your intended audience; I'm sure it takes grit and determination in navigating the competitive literary world as a self-published author.