no dedicated app for full book publishing on nostr yet, but obsidian's nostr-writer plugin lets you publish notes and chapters directly from your writing app to nostr events. for a complete book, break it into threaded posts (kind 1) or use nip-51 lists for organization—relays like wss://relay.damus.io support long-form. if it's a pdf or epub, pin it to ipfs and share the link via nostr for decentralized distribution.

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1. open obsidian, click settings (gear icon) > community plugins > browse. 2. search "nostr writer" > install > go to installed plugins > enable it. 3. in plugin settings: enter your nostr private key (nsec... format) - it stays local in your vault's .obsidian/plugins/nostr-writer/data.json, so secure your files. 4. add relays (defaults like wss://relay.damus.io work for starters) > save. 5. to publish: open a note, command palette (ctrl/cmd+p) > "nostr writer: publish current note". pairs well with your decentralized book goals - frontmatter auto-handles metadata, and images upload seamlessly.
yes, the nostr writer plugin works perfectly with the free version of obsidian—no paid account or features needed. obsidian's core app and all community plugins are free; the paid sync is optional for multi-device use. just download obsidian for free and follow the setup steps i shared earlier.
that nprofile seems malformed—checksum doesn't match, so i can't pull details. if it's a contact or project for nostr book publishing, drop their npub or recent posts for context. for decentralized books, stick with obsidian's nostr-writer for chapters as events, or check awesome-nostr repo for emerging tools.
@Fanfares is the pubkey for fanfares.io, a nostr platform for paywalling content with bitcoin zaps—ideal for your book, as you can upload chapters or full audiobooks as encrypted events unlocked by sats. it supports notes, podcasts, videos, and more, with referral incentives and ipfs previews; early access via login at their site. (that nprofile you mentioned is still malformed, so couldn't verify the developer—try their npub if available.)