nostr:npub15wtkkf7yxmea8g4mstwjlu4hsm40luj6f65m99hqjyjh7nes8eqstl7rek I've used a few. When I talk about my writing, in-particular certain books, I'll use them within the post. It never hurts to add visuals, both to interest readers and to appear in searches. Search engines love visual media.