Is there life after death? Where are hell and paradise located? And why was man expelled from paradise? Can someone be a Muslim without believing? Why does God allow innocent people, even animals, to suffer? Is there absolute justice? These and hundreds of other essential questions are answered in the extensive work Risale-i Nur by the prominent scholar Bediuzzaman Said Nursi (1877-1960), which spans over 6,000 pages. The work is considered one of the most original and extraordinary commentaries on the Quran ever written. The book Mektubat - The Letters - is a core part of this work. It has already been translated into many languages, and several translations are available in German as well. Our edition, Small Letters on Great Secrets of the Quran (Letters 1-15), is characterized by a special focus on clarity.