We All Speak Z is a father and daughter collaboration, written by Melanie Hertling and illustrated by Heiner Hertling. We All Speak Z tells the story of restless children who ask their grandfather for a bedtime story. Instead, Grandpa tells the children a secret; when we sleep, we speak the same language of everyone, everywhere- the language of "Z". When the children realize that this means that they can communicate with anyone they can think of,...