Those yellow books that describe the torment of the afterlife, detailing the various scenarios and stories that happen within the tomb. They talk about the two kings, Naki and Nakiir, and what they say to the deceased. They also describe the kinds of torment that the deceased suffer. These are numerous books that fill the streets, and people flock to them in large numbers. But what these books contain is mostly imagination. The truth behind this mystery remains unknown to anyone. The only source of information about these secrets is the words of the Quran and the testimonies of those who have access to these mysteries.