Part of "The Life Cycle Series" from Crabtree Publishing Company, this title covers a lot of ground in its thirty-two pages. The authors start with the interesting fact that salmon, unlike most fish, spend part of their lives in fresh water and another in salt water. How they are able to do this, and why, make up a great deal of their life cycle story, as kids will be fascinated to learn through the text and full-color photos in this book. Scientific concepts are explained in an age-appropriate, easy-to-understand way. Other topics included in the discussion about alevins, fry, parr, and smolt on their way to becoming adult salmon are the environmental dangers they currently face, the problem of over-fishing, and how people can get involved in order to help sustain this important species for future generations. The book closes with a helpful glossary and subject index. Great choice for library and classroom reading.