He was working on a book about how the brain works.

And, whether in cold blood or hot, his brain worked well enough.

"I had a lot of people help me out to get my brain working."

Was my brain working on the problem all that time?

His whole brain and body had been working out there.

I wanted to tell you this, so your big brain could work on it.

"Why are you the only one whose brain is working?"

It's the part of you that knows when your brain isn't working right.

Keep calm and get your brain working, he told himself.

And it turns out that is absolutely the key to how the brain works.