This is the most "classical" part of the book. If you find a PDF of Goldstein, pay close attention to the derivation. This is a favorite exam question because it links classical mechanics to nuclear physics.
Goldstein’s Classical Mechanics is a conversation with a brilliant but demanding teacher. Whether you hold the physical book or read it on a screen, respect the material. Master the Lagrangian and Hamiltonian, and you will understand the deep symmetry underlying all of modern physics—from quantum field theory to general relativity. classical mechanics by goldstein pdf
You can access the textbook and related deep-study materials through these academic repositories: Complete Textbook (3rd Edition) This is the most "classical" part of the book
The text is structured to build a rigorous analytical framework for theoretical physics: classical mechanics by goldstein pdf