Radio - and perhaps airplanes, and then of course, the atom bomb - was the preeminent technology of the first half of the 20th century. It was how the Third Reich controlled its citizens, spread lies, and disseminated fear.

WWII is something contemporary readers already know a lot about. If our schools are doing their jobs, they know about the invasion of Normandy, the Hitler Youth, the Holocaust, and at least a few of the horrors of the Eastern Front.

Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.

Invisible Beasts is a strange and beautiful meditation on love and seeing, a hybrid of fantasy and field guide, novel and essay, treatise and fable. With one hand it offers a sad commentary on environmental degradation, while with the other it presents a bright, whimsical, and funny exploration of what it means to be human. It's wonderfully written, crazily imagined, and absolutely original.

To say a person is a happy person or an unhappy person is ridiculous. We are a thousand different kinds of people every hour.

So how, children, does the brain, which lives without a spark of light, build for us a world full of light?

I write reviews of science books for the Boston Globe, so I like to give science books.