I have enjoyed these books:

https://www.manning.com/books/oauth-2-in-action very specific to OAuth, lots of code)

https://www.apress.com/gp/book/9781484250945 More focused on bigger identity strategies and problems.

Also, the IDPro body of knowledge is free and useful:

https://idpro.org/body-of-knowledge/

@mehamm

I am working on a multi tenant guide. Thank you very much for your feedback; I'll make sure to include it.

As you continue to build out your multi tenant application, please continue to post on the forum about your progress and/or any other questions. 🙂

We often hear our multi tenant support is a differentiator for FusionAuth, and would love to make it easy/clearer for everyone.