You Know How to Whistle, Don’t You? is a book by Barbara Park, first published in 1988. The book tells the story of a young boy named Chester who is struggling to learn how to whistle. With the help of his friends, he eventually masters the skill and gains confidence in himself.
The book has been praised for its humor, heart, and positive message. It has been translated into more than 20 languages and has sold more than 2 million copies worldwide. In 2002, it was adapted into a made-for-television movie starring Luke Benward as Chester.