You can use this page to email Brian Pontarelli and Dan Moore about The Modern Guide to OAuth.
About the Book
This guide is different than most of the others out there because it covers all of the ways that we actually use OAuth. It also covers all of the details you need to be an OAuth expert without reading all the specifications or writing your own OAuth server.
This book is based on hundreds of conversations and client implementations as well as our experience building FusionAuth, an OAuth server which has been downloaded over a million times. Learn more about FusionAuth at https://fusionauth.io