As people around the world celebrated man's first steps on the moon, the astronauts of NASA's Apollo 11 mission placed a silicon disc containing messages of goodwill from 73 different countries near their landing site on the Sea of Tranquility. Inscribed with the words, “From Planet Earth – July 1969,” the disc signified the first time humanity joined together in celebration. Messages on the Moon , a non-fiction picture book by Jill Friestad-Tate, illuminates the true story behind a little-known object that united the world in peace and hope.