James Clear in his recent book Atomic Habits suggests some examples of habit shaping(in this case for becoming an early riser) and says:
Be in bed by 10 p.m. every night (reading a book, talking with your partner).
My question: Is "reading a book" an imperative sentence here, so means: "Read a book before sleeping!"?
He had said before:
In one study, scientists instructed insomniacs to get into bed only when they were tired. If they couldn’t fall asleep, they were told to sit in a different room until they became sleepy. Over time, subjects began to associate the context of their bed with the action of sleeping, and it became easier to quickly fall asleep when they climbed in bed. Their brains learned that sleeping—not browsing on their phones, not watching television, not staring at the clock—was the only action that happened in that room.
I don't know if there is a contradiction or maybe I misunderstand the meaning
of nonverbal sentence(reading a book, talking with your partner).
Could you pleas explain it to me?