The greatest sage of Hinduism has made contributions to the following scriptures which are all worth reading:
Bhagavad Gita Bhashya
Brahm Sutra Bhashya
Upnishad Bhashya
Vishnu Sahasranamam Bhashya
Vivek Chudamani
Updesh Sahari
Aparokshanubhuti
Atma Bodha
Vakya Sudha
Tattva Bodh
Vakya Vritti
Panchikaranam
Shivanand Lahari
Soundarya Lahari
Nirgun Manas Puja
Kanak Dhara Stotra
Bhaj Govindam
Bhavani Ashtakam
Nirvan Shatkam
Sadhana Panchakam
Shiv Manas Pooja
Siddhant Tattva Bindu