Pay attention to your environment. I still remember one fellow student complaining in college about his bio or chem grade -- some such. He always studied with music on.

I told him that would never work for me.

He studied for the next test without music. Came back all excited: Got an A.

I suspect Kay has had many decent offices in which to consume those books. Just a guess.

Environmental needs may vary by individual. Regardless, they are NEEDS for effective assimilation and thinking.