[ackfoobar]

I was once dropped into a Spring codebase. I consider myself a decent programmer, but I couldn't navigate it at all. Other than that time I've been able to avoid magical frameworks in my career.

But I do want to learn Spring. What material would you recommend?

[cgh]

Not to be glib or state the obvious but the Spring project has excellent docs: https://docs.spring.io/spring-framework/reference/index.html

[krooj]

Spring In Action. Not Spring Boot in Action - Spring. https://www.manning.com/books/spring-in-action-fifth-edition