Hi. Could you please name the author. Is it this one? https://www.amazon.com/Quantum-Einstein-Debate-Nature-Realit... Thanks.

Yes - I think that's the one the OP recommended. Great read. Gives a superb historical overview and the reader can follow the twists-and-turns of discovery. You get to 'know' the scientists as they battled the Quantum. Sets the scene before delving into other books that teach the actual Math etc.

That's not a book about QM but about "philosophy" of how QM is interpreted. Even if you master every word in it, you won't be able to do any real QM.

Besides, Einstein is just about the worst physicist to learn from on QM

Sorry yep that's it! Read it after I'd already taken QM in undergrad, and honestly it made the topic 10x more interesting.