The Theoretical Minimum
Landau's theoretical minimum was a test so rigorous that only a few ever passed it. Presumably it tested something like the contents of the famous Landau and Lifshitz series on theoretical physics. Leonard Susskind has been working on his own "Theoretical Minimum" series, and while it is at most an extremely simplified "Theoretical Minimum for Dummies", your humble dummy correspondent found the Quantum Mechanics volume very nice. I probably never used quantum mechanics once during a long career doing mostly atmospheric physics, so I had forgotten a lot. There's an awful lot of quantum mechanics you won't learn from it, but it's very good in presenting the fundamentals in a mathematically sound way.
Anyway, he and his coauthor have a new volume coming out on Special Relativity and Classical Field Theory so I decided to order it.