Complete list of publications (1972 to 2011)
Information about four recent books
The Ciphers of the Monks:~ A forgotten number notation of the Middle Ages (2001)
Studies in astronomical timekeeping in medieval Islam (2004-05)
From Regiomontanus’ acrostic for Cardinal Bessarion to Piero della Francesca’s enigma (2007)
Other pages on
this website
An ordered list of
medieval Islamic and European astronomical instruments
Bibliography of
writings on astronomy and mathematics in early Islamic Baghdad