Upāsana Granthas
Ādi Śankarācārya composed 100+ Stotras to exude Bhakti for all forms and shapes of the Paramātman. These Stotras are directed towards orienting, disciplining, and focusing our minds. Some of these include Śivānanda Lahirī and Dakṣiṇāmūrty Stotra. Prof. Mahadevan has lectured on Śivānanda Lahirī and Dakṣiṇāmūrty Stotra in detail.
Ācārya Śankara has also composed Prakaraṇa Granthas. These granthas take a true seeker to level two of spiritual evolution. These include the Sādhana Pañcakaṃ, Manīṣā Pañcakaṃ, Ātmabodha, etc. Prof. Mahadevan has elaborated on Sādhana Pañcakaṃ and Manīṣā Pañcakaṃ in detail.