The rhythms of the arctic year play out on the pages of this quietly lovely picture book. Successive double-paged spreads describe, month by month, the radical changes in daylight and temperature as the year progresses from one summer solstice to the next. Each spread features one type of animal going through its seasonal activities; six months later, that same animal appears again, adapting to the changes. Miller’s quiet, present-tense text simply describes the conditions, spending special attention on the effects of the shortening or lengthening of the day; a bar extends across the top of every page to indicate relative length of day and night, times of sunrise and sunset, and average high and low temperatures (in Fahrenheit). Van Zyle’s acrylics are equally simple, employing a variety of perspectives and effects to show off the unique beauties of the arctic without sentiment. A lovely treatment of a difficult concept and of a very special place. (glossary) (Picture book/nonfiction. 6-9)