Kitab al-wadih bi-l-haqq

The Kitāb al-wāḍiḥ bi-l-ḥaqq (Arabic: كتاب الواضح بالحق), known in Latin as the Liber denudationis (lit. 'Book of Denuding'), is a Copto-Arabic apologetic treatise against Islam. It was written by a Muslim convert to Christianity, Būluṣ ibn Rajāʾ, around 1010 in Fāṭimid Egypt. Its purpose is to provide a refutation of Islam on the basis of the Qurʾān and the ḥadīth (tradition). It was translated into Latin in the 13th century, probably in Toledo. It had much greater influence in translation than in its original language.