In my experience desktop PDF readers are better than paper for technical books - maybe there are good tablet readers for them too, but they'll allow you to jump

In my experience desktop PDF readers are better than paper for technical books - maybe there are good tablet readers for them too, but they'll allow you to jump directly to sections and make bookmarks in an instant rather than searching through random physical pages and holding your finger in different spots. Displaying the full tree of the book's index while you read through interesting sections is incredibly valuable. I find it hard to read any technical book on something other than the computer I'm using it on though. Without being able to copy and paste to try things out on my own I tend to learn absolutely nothing.