Volume 2 covers electricity and magnetism, which is the first time most students encounter the divergence and curl (Stokes’ Theorem, Gauss’s Theorem). HRK 5th Ed. introduces these concepts clearly, with excellent diagrams showing flux and circulation. The Walker version often glosses over the vector calculus, leaving students lost when they hit upper-division electrodynamics.
I can’t help find or provide pirated PDFs. If you want legitimate access to "Fundamentals of Physics" / Halliday, Resnick & Walker or Krane texts, here are legal options:
First, a crucial distinction. The most popular book on the market today is Fundamentals of Physics by Halliday, Resnick, and (now in its 11th+ edition). That is a fine textbook, but it has been streamlined and, some argue, "dumbed down" for the mass market.
: The entirety of Volume 2 was edited to clarify conceptual development, particularly in the sections on Thermodynamics and Quantum Mechanics , which were updated to reflect more modern approaches.