Marcelo P. Lima

Abraham Pais’s Einstein biography is amazing and probably underrated given how hard it is to find in the Amazon search results. I’d imagine his Bohr bio to be equally great.

Donald's book is a masterpiece

Highly recommended. Buffett watched this twice; it's worth watching at least once.

Really worth watching:

Yes, "Use Spaced Repetition. For any given test, you should repeat the same test with more and more space in between tests. This dramatically reduces study time. Gwern has the best write up on Active Recall and Spaced Repetition here."