hey nostr:npub1guh5grefa7vkay4ps6udxg8lrqxg2kgr3qh9n4gduxut64nfxq0q9y6hjy and or nostr:npub1qny3tkh0acurzla8x3zy4nhrjz5zd8l9sy9jys09umwng00manysew95gx what was that book that Bitcoin Sign Guy was shilling in the last RHR? Crypto Current? I haven't been able to find it anywhere