People often mistake covering material for learning. You can zoom through material at any speed you like, but learning is building something in your head. How

People often mistake covering material for learning. You can zoom through material at any speed you like, but learning is building something in your head. How fast you can build things in your head relates to what you've already built, what and how much you want to build onto it, inherent difficulty of each specific thing you want to build (easier to paint a large wall than build a small cabinet), your energy level, and some amount of natural talent. As in any building project, you'll probably have more energy if you do it a bit at a time and either rest or alternate tasks. You might find it better to alternate reading the book and writing code. You might go more slowly through the book but still build the knowledge in your head faster, and the latter is the real job. You might also do better with an easier book. Again, it's how fast and well you build things in your head, not get through a book, that matters.