I'll let you in on an anecdote to show how dangerous what you're doing is.
I drive about 20 miles a day on I-64. It's well-marked, has wide lanes, and is fairly level.
For a month, I could consistently go the entire stretch on this 4-lane divided interstate without touching the wheel. But one day, about a week ago, a car put very dark skid marks that start parallel to the lane markings in the left lane and veer to the right lane. When I came across this stretch of pavement the other day, the camera chose to follow the skid marks and my car veered toward the right lane. I intervened, but if there hadn't been intervention I would've crossed into the right lane without question.
There was no beeping, no "take over" message, nothing. For the last few days, I've tested this same stretch and the car actually follows the skid marks and veers into the right lane every time. And every time, there is no beeping, no "take over" message--despite great visibility conditions for the camera (a nice flatly-lit cloudy day).
So a stretch of highway that otherwise behaves perfectly (and used to behave perfectly) now initiates an abrupt swerve into adjacent lanes.
Had you been reading your book in this area, you could very likely have been involved in a serious accident.