I spent a good chunk of yesterday listening to classical music while finishing up Walden, both furnished by my iPad. People have commented about it's weight, which can give your wrist a workout (probably one that is unintended). I found that if you can sit in a a comfortable chair with your legs propped up, then your lap makes for an ideal book holder and the "getting immersed in the reading" can take over.
The passage quoted below offers some timely advice for us all. People today would benefit from reading the chapter that is the source of this passage, Spring, as well as the Conclusion.