The war against Voldemort is not going well; even Muggle governments are noticing. Ron scans the obituary pages of the Daily Prophet, looking for familiar names. Dumbledore is absent from Hogwarts for long stretches of time, and the Order of the Phoenix has already suffered losses. And yet . . . As in all wars, life goes on. Sixth-year students learn to Apparate -- and lose a few eyebrows in the process. The Weasley twins expand their business....

Dumbledore lowered his hands and surveyed Harry through his half-moon glasses. "It is time," he said, "for me to tell you what I should have told you five years ago, Harry. Please sit down. I am going to tell you everything."

Talking lions, philosophical bears, very hungry caterpillars, wise spiders, altruistic trees, companionable moles, urbane elephants: this is the magnificent menagerie that delights our children at bedtime. Within the entertaining pages of many children's books, however, also lie profound teachings about the natural world that can help children develop an educated and engaged appreciation of the dynamic environment they inhabit. In Beasts at Bedtime,...