By popular request, I just published a version of "The Little Book of OAuth 2.0 RFCs" as a free downloadable PDF!
https://oauth.net/books/#little-book-of-rfcs
https://oauth.net/books/#little-book-of-rfcs
@aaronpk Nice - it will be convenient having all those RFCs in one place rather than in several different browser tabs like I have done in the past.