Just as we gravitate to candidates or causes because we already know and like what they have to offer us, so too do we choose books because we expect them to reflect a world view — or a hunch — we already have.

And so it is with The Shallows by Nicholas Carr. I remember reading a review of this book when it came out a few months ago and wanting to buy it immediately. But I forgot the title and the author. This is a telling fact. Because the subtitle of the book is What the Internet is Doing to Our Brains.

I was hoping to find in this book an explanation for why it seems more difficult for me to concentrate, why I interrupt my reading or writing constantly throughout the day to check e-mail or Google a word. And I’m finding that and so much more.

“Our use of the Internet involves many paradoxes, but the one that promises to have the greatest long-term influence over how we think is this one: the Net seizes our attention only to scatter it.” Carr cites brain studies and other research to support his claims. He provides an intellectual history of the reading brain. And he reaches this conclusion: “The mind of the experienced book reader is a calm mind, not a buzzing one.”

So it may be that I chose this book because I knew it would support a theory about the world I already have. But even so, this once-calm but now-buzzing brain thinks Carr is onto something.