Book excerpt: This accessible text explains to readers how the blue whale is endangered and what can be done about it. With an easy-to-follow narrative, readers learn what the blue whale is, where it lives, what its life is like, how it communicates, and most important, how to save it from becoming extinct. The text gives a thorough explanation of what the word endangered actually means and offers a clear explanation of how to save not only the blue whale but all species that are currently at risk.