School Library Journal: Gr 3-6- This collection of 11 articles originally appeared in Highlights magazine during the 1990s and early 2000s. Each article tells how a scientist was able to unravel a mystery about some kind of animal. Myers's stories about dolphins, polar bears, elephants, and other animals contain many interesting scientific facts and are written in accessible and engaging prose. The book has a clean, uncluttered layout that invites consecutive reading. Most of the pages have attractive watercolor illustrations. Each article opens with a humorous picture, and more informative images and diagrams appear in the body. This is a good choice for children who can read chapter books, and who enjoy nonfiction.-Donna Cardon, Provo City Library, UT