Ashcroft And Mermin -

: A popular piece of physics lore mentions that Lev Landau ranked physicists on a logarithmic scale (Newton at 0, Einstein at 1); Mermin reportedly placed himself at 4.5. 4. Legacy vs. Modernity

: They introduce quantum mechanics to fix the Drude model, then show that even this isn't enough. Ashcroft and Mermin

: Only after exhausting these models do they introduce crystal structures, motivating the reader to understand why a periodic potential is the only way to explain things like insulators or the Hall effect. 2. Core Scientific Contributions : A popular piece of physics lore mentions