The book deals with the relationship between physics, sep. cosmology, and religion, esp. Christian theology, displayed as a fictive dialogue of a physicist and a theologian in outer space. Special attention is paid to the difference of the language in science and theology. A clear cut answer to the question in the title (Does God play dice?) is, therefore, not given. Instead of an easy answer the book is asking what does it mean if we answer such a question with Yes or No.