nostr:npub1psdfxfpxz2cwmmnsk60y3nqpn2tqh9n24h4hstvfkwvr6eaek9js499sr7 nostr:npub1kwzvvj9384ukvgz86n3ztusn38hgzvajslmtg9jlz3wnz60cx6nsnyx29m It's also $2.99 in Apple Books. I don't know how this coordination works, but often when someone's announced that their book is on sale on Amazon it appears on Apple for the same price.