Did you know that they lived in Louisville? Not far from here! Margot Theis Raven relates the story of the sisters who wrote the words and music in 1889 and 1890, as one of the many songs that Patty Hill used to teach her kindergarten children. She came up with the words to the songs, and her sister Mildred wrote the music to them. Happy Birthday to You! The Mystery Behind the Most Famous Song in the World includes more details of the sisters' lives with their large family and the early years of kindergartens. Full page paintings by Chris Soentpiet add to the enjoyment of this book.