Here is the essay:

In the digital age, where students are hunting for PDFs to get quick answers, Ohanian’s treatment of Entropy forces a pause. He discusses the "Arrow of Time" with philosophical weight while maintaining mathematical precision. He draws the line between the macroscopic human experience (hot coffee cooling) and the microscopic chaos (molecular collisions), a connection that is often lost in dryer texts.

Hans Ohanian's Physics for Engineers and Scientists, Volume 3 (Third Edition) is a widely respected calculus-based textbook focusing on modern physics , including quantum mechanics and optics

Let’s be direct. When you search for on Google, you will find dozens of links. Most of them are on torrent sites, shady student forums (like Library Genesis or Sci-Hub), or random university file servers.