 In this context, the metaphysical sections of The Book of Science for ʿAlāʾ-al-Dawla and of The Book of Salvation should also be taken into account. The former work obtained wide resonance since it was taken as model and incorporated by al-Ġazālī in his exposition of philosophy (The Aims/Doctrines of the philosophers, Maqāṣid al-Falāsifa), a conduit for Avicenna’s metaphysics in the West as well. The latter work was copied in manuscripts at a very ancient stage, and it was commented upon by important scholars like Ẓāhir al-Din Ibn Funduq al-Bayhaqī (d. 1169–1170) and Faḫr al-Dīn al-Isfarāʾinī al-Nīsābūrī (fl. VI/XII c.).