The Rise of Colleges, 1981 The Rise of Humanism in Classical Islam and the Christian West: With Special Reference to Scholasticism, 1990: Edinburgh University Press Paths to the Middle East Ten Scholars Look Back, 1993 Editor, Arabic and Islamic Studies in honor of Hamilton A.R. Gibb, 1965: Leiden, Brill. Ibn `Aqil: Religion and Culture in Classical Islam, 1997: Edinburgh University Press