Ibn Khalaf al-Murādī (Arabic: ابن خلف المرادي; 11th century) was an Andalusian engineer who possibly dwelled in Toledo and Cordova (Córdoba, Spain).
He was the author of the technological manuscript entitled Kitāb al-asrār fī natā’ij al-afkār (The Book of Secrets in the Results of Thoughts or The Book of Secrets in the Results of Ideas). It was copied and used at the court of Alfonso VI of León and Castile in Christian Spain in the 11th century.
The manuscript provides information about a “Castle and Gazelle Clock” and many other forms of complicated clocks and ingenious devices. Al-Muradi was a contemporary of Abū Ishāq Ibrāhīm al-Zarqālī as well as another mathematician and astronomer from Toledo by the name of Ibn Khalaf al-Saydalani
In 2008, the Book of Secrets of al-Muradi was published in facsimile, translated in English/Italian/French/Arabic and in an electronic edition with all machines interpreted in 3D, by the Italian study center Leonardo3. Source
Julio Samsó’s review of the Italian edition and translation (into English) in Suhayl 9 (2009-10), pp 234-238.
See also Julio Samso’, Andalusian Astronomy in the Eleventh Century, Infrence-Review, Vol. 5, NO. 3 / September 2020