Lyn Alden's book, Broken Money, is excellent. There's a lot about bitcoin there, including the technical details, but also it's a great summary of economics including the history of both commodity money and fiat money

we tested zaps on this note… we made six attempts to⚡zap this note, at horhe19@speed.app, over a period of 28 minutes. Six of the zaps were successfully paid... please check for 6 satoshis received. problem: we found that your lightning address server **did not* properly produce zap receipts, and/or didn't send the zap receipts to the relays specified in the zap. (the zap spec requires that the zap receipts be sent to the relays specified in the zap.) this means a nostr user who zaps you might not see a number appearing next to the ⚡ icon after zapping.... if you wanted to fix this... you could try getting a free rizful lightning address -- https://rizful.com ... if u get it set up, pls reply here so we can do this ⚡zap test again.