Qabus-Nama

Qabus nama or Qabus nameh (variations: Qabusnamah, Qabousnameh, Ghabousnameh, or Ghaboosnameh, in Persian: or , book of Kavus), "Mirror of Princes", is a major work of Persian literature, from the eleventh century (c. 1080 AD).
It was written by Keikavus, the Ziyarid ruler of parts of Tabaristan, and was dedicated to his son Gilanshah.
The belles-lettres was written in 44 chapters and outlines princely education, manners, and conduct in ethical didactic prose.
Extant original copies.
The Turkish version was then translated into German by Heinrich Friedrich von Diez as Buch des Kabus in 1811, and a source of inspiration for Goethe's West-östlicher Diwan as he was in contact with von Diez.
The text was translated directly from Persian into English by Reuben Levy with the title: A Mirror for Princes in 1951. French, Japanese, Russian, Arabic, and Georgian (1978) language translations also followed.
Cultural references.
This work is mentioned several times in Louis L'Amour's "The Walking Drum" as well as in Tariq Ali's "The Stone Woman".