Far from being obscure and the toy solely of the mathematical, Fibonacci sequences are found in natural structures such as the arrangement of seeds on a pine cone and the branches of certain plant stems. Posamentier (mathematics education, City U. of New York) and Lehman (mathematics, Humboldt U. in Berlin) fully explore this fascinating phenomenon, starting with its discover and taking it to the golden rectangle, music, and art as well as its many applications in nature. They keep the mathematically challenged in mind, and their text is both lively and accessible without talking down to readers. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)