Uh…speaking of ‘focus’ the original ‘F’ word haha
I realize, I never did answer this question, I simply babbled about my reading habits. :-/
I’d say, yes, you are probably better prepared to take on a more intense read if you are well rested and not distracted by other things.
Light background music, or quiet is a personal pref. I prefer quiet myself or mellow no lyric instrumentals.
Also…if you have a hard time focusing on a lengthy book, maybe pick up some easy, short reads, such as trivia and interesting facts. One I have been enjoying is called ” Do Penguins have knees, and other imponderables of the mysteries of life.” haha
Each entry is only a page or two long and keeps rolling over into something new and stimulating.