Ibn al-Muqaffa' was suspected of being a Zindiq (heretic or 'free-thinker') by the Islamic authorities of his time, in part because of his previous creed. Khulusi believes that in addition to his known works, he is therefore likely to have published anonymously, or attributed work to other authors such as Kitab al-Taaj of al-Jahidh, or concealed his views as quotations in larger works as Siyar Muluk al-'Ajam in 'Uyun al-Akhbaar of Ibn Qutaybah and 'Ahd Ardashir (The Covenant of Ardashir), and in Tajaarib al-'Uman (Experiments of The Nations) of Ibn Miskawayh. In The Nights, it would have been very easy for him to hide entire stories anonymously and Khulusi suspects that the entire tale of King Jili'ad is the work of Ibn al-Muqaffa'.[1][2]