Each of these books focuses on nine species, describing how they live and adapt to their environments during the course of a day. The species selected for discussion are highly diverse and appealing. Water animals include the oyster, whale, shark, crocodile and dragonfly. The tiger, sidewinder, kangaroo and hummingbird are among the hot-climate animals. In a cold climate, we find the polar bear, lemming, condor, rabbit and snowy owl, among others. On each page, there are full-color photos of animals in the wild, and illustrations of organ systems, skeletal structures, locomotion patterns, food charts, distribution maps and special adaptive features. The writing is vivid and rich in detail, conveying the author's enthusiasm for nature and conservation; however, the vocabulary is difficult and sometimes specialized. There are no indexes or glossaries. The sturdy glued binding sometimes results in a very narrow center margin. Older nature browsers and those interested in animal conservation and adaptation will find a wealth of information in a visually attractive format.