Brilliant and interesting photographs, easily understood diagrams and a short, informative text are the highlights of this "Patterns in Nature" series, which features titles on day and night, hibernation, phases of the moon and seasons of the year. Children will indeed choose this book by its cover: it depicts a huge brown bear sound asleep, eating grass and grabbing a fish from the river. In answer to the question on the first page, "why hibernate?" we see a picture of splotches of snow stuck to a bear surrounded by snow. "Food is hard to find." We see tiny animals hibernating also, including clusters of bats that "don't even go to the bathroom." Getting ready to hibernate means getting fat on fish (bears), filling a burrow with acorns (chipmunks), or digging a warm hole in the mud (frogs). Each title features a pattern diagram on the last page—in this case getting ready, finding a den, hibernating, and leaving the den. "Hibernating is one of nature's patterns." Children can see the principle and learn the words that explain that principle. There is a very short index, a glossary, a list of additional books, and a reference to the www.facthound.com web site with links to age-appropriate sites for each book. This is an outstanding series of concept books for new and pre-readers; the photographs make the book interesting enough to use with older children who struggle with reading and concepts.