Java Concurrency in Practice[1] has always been recommended by my colleagues. I'm about halfway through it and I think it makes the concepts pretty clear. Even

Java Concurrency in Practice[1] has always been recommended by my colleagues. I'm about halfway through it and I think it makes the concepts pretty clear. Even if you move away from Java one day, I think the investment is not lost at all. Then you could ask your favorite LLM to create concurrency exercises once in a while to practice. [1]: ISBN 978-0321349606