You can now read Mastering the Lightning Network book by
@aantonop, @roasbeef and @renepickhardt for free at: https://github.com/lnbook/lnbook

https://nostr.build/i/nostr.build_c7a6edec0bef9abf7dd8fa1dfe022ad1c03c18c20c68bb9ae172b33d11dd67a6.png