This volume advances the critical study of exegetical, doctrinal, and political authority in Shiʿi Islam. Naive dichotomies of “reason” and “esotericism” in Islamic Studies have often marginalized Shiʿi thought or impeded its understanding. The studies presented here aim to foster more exacting frameworks for interpreting the diverse modes of rationality and esotericism in Twelver and Ismaili Shiʿism and the socio-epistemic values they represent within Muslim discourse. The volume’s contributions highlight the cross-sectarian genealogy of early Shiʿi esotericism; the rationale behind Fatimid Ismaili Quranic taʿwīl hermeneutics; the socio-political context of religious authority in nascent Twelver Shiʿism; authorial agency wielded by Imami hadith compilers; the position of esoteric Shiʿi traditions in Timurid-era Ḥilla; and Shiʿi-Sufi relations with Uṣūlī jurists in modern Iran. Contributors: Rodrigo Adem, Alessandro Cancian, Edmund Hayes, Sajjad Rizvi, Tahera Qutbuddin, Paul Walker, George Warner