 The other metaphysical summae by Avicenna single out and emphasize particular aspects of the overarching architecture of metaphysics displayed in The Science of Divine Things. Thus, The Book of Pointers and Reminders (Kitāb al-Išārāt wa-l-Tanbīhāt) underscores the importance of philosophical theology within metaphysics by expanding it with respect to a much thinner ontology; the Persian The Book of Science for ʿAlāʾ-al-Dawla (Dānešnāme-ye ʿAlāʾī) places metaphysics as first theoretical discipline (before natural philosophy and mathematics), after the preliminary logic, in order to signal its priority in the system of the sciences; the lost metaphysics of The Easterners (Al-Mašriqiyyūn) or The Eastern Philosophy (Al-Ḥikma al-mašriqiyya) might have assigned a clear-cut epistemological role to the divide between ontology and philosophical theology within metaphysics by splitting metaphysics into two distinct sciences corresponding to these two parts. The metaphysics of The Book of Salvation (Kitāb al-Naǧāt), finally, though structurally similar to The Science of Divine Things, differs from it in specific points and formulations, in so far as it incorporates doctrines from Avicenna’s previous metaphysical works.