In this thoroughly well-composed book with the accompanying CD, letters and songs, texts and tones, words and sounds come together and encounter each other. Rainer Oberthür writes personal responses to 20 imagined yet authentically formulated letters from children aged 9 to 13, addressing the big questions of being human in the world, as well as religion and faith. The 16 songs by Carolin No open up their own questions and horizons of meaning, reflecting the themes of the letters in their own way. Through the open composition and the alternation of letters and song lyrics, new perspectives between heaven and earth continuously emerge, while the questions and the act of questioning are always kept alive. The "What-do-you-believe-project" invites reflection and thought, reading and listening, seeing and understanding. Those who read and listen are repeatedly confronted with the question: What do you believe?.