I liked this book because it told me facts about a trumpeter swan in fact I didn't even know about trumpeter swans at all, But I didn't like a couple parts in the book because they kinduve seemed sad, which I know that everybody hates feeling. But otherwise it is a really good book. One thing that I am wondering is that what if the pen dies what will the cob do find another mate but once when the cob and the pen mate then they stay together forever.