The books written on the world strange items and categories, may be called as a literary genre, too.They also originate from the people's beliefs, traditions, customs, and culture of a specific region. Some of these strange items and categories have been turned into various tales of mysteries. The experts of other fields, such as geography, history, etc. have used them as well. Azari Toosi has considered them from a mystical and moral perspective. Based on his attitude toward them, he has created certain poetical works.