You don't need to steal the PDF. Here is how to get the 19th edition legally, often for less than the price of a pizza.

Open Educational Resources (OER): If the cost of the 19th edition is prohibitive, many professors recommend "Principles of Economics" by OpenStax as a high-quality, free alternative that follows a similar pedagogical structure. How to Use the 19th Edition Effectively

He stared at the quote—the very essence of Samuelson’s teachings. His laptop chimed and restarted, clean as a whistle, with no PDF in sight.