Sandilya Bhakti Sutras (SKU: B 5119) is an ancient work and has two well-known Bhasyas or commentaries: one by Svapnesvara and the other by Narayana Tirtha. The former has been considered as a pioneering work and held in higher esteem since it was written centuries before Narayana's Bhasya.
 
This book has the original Sutras and the text of the Bhasya in Devanagari and the English translation of both.