Steve Silverman, from Advanced Scientific Concepts in Santa Barbara, Calif.

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"It's a great book for adults to read because it has a lot of the concepts ... the scientific and medical concepts of treatment in it, " Brawley said.

CNN: 'Nana, What's Cancer?' tackles tough questions

We prefer to avoid awkward scientific findings on the biology of violence that question our concepts of free will and punishment and harken back to the bad old days of eugenics and brain lobectomies.

CNN: Opinion: Unlocking crime using biological keys