Is the GitHub PDF a "better" way to learn? In terms of cost and portability, arguably yes. However, relying solely on a scanned PDF or random code gists leads to fragmented knowledge. The true "depth" comes from struggling through Srivastava’s prose, attempting the exercises before looking at the solutions, and drawing the pointer diagrams on paper.
Before we dive into the solution, let's look at the risks of standard PDF-hosting sites: Is the GitHub PDF a "better" way to learn