Sultan of Kabul is incorrectly written and should be written as "sultan of Kabul" to be its meaning:
Sultan of Kabul = sultan KabulSultan Khan is an Afghan bookseller of Kabul. It is a great lover of the humanities, the arts and the poetry of his country. However, different crises that occur in their country are complicating his work. Throughout his life the author describes the way of life of Afghans, their hardships, lack of rights of women and the oppression to which they are enforced.
