Kai Lüftner was born in East Berlin. He is a children's and youth book author, musician, composer, audio book editor and director. In the meantime he has published more than 20 books, celebrated many successes with his children's music project "Rotz'N'Roll" and given concerts. Kai Lüftner lives with his family on the Danish Baltic Sea island of Bornholm. Wiebke Rauers was born in Düsseldorf. She studied communication design with a focus on illustration in Düsseldorf. After graduating, she moved to Berlin and worked as a character designer in an animation studio. She has been a freelancer since 2015 and illustrates children's books and films/series. She lives in Berlin with her daughter, her husband and lots of stuffed animals. Marshall Yarbrough is a writer, translator, and musician. He has translated works by Ulla Lenze, Norman Ohler, and Wolf Wondratschek, among other authors. He lives in New York City.