Beyond the Shri Sai Satcharita, what other major Guru biography is mentioned as being widely popular and studied in Maharashtra?

In addition to the Shri Sai Satcharita, the preface gives special mention to another ancient and highly revered Guru biography. As described in Chapter 0, this is the work concerning Shri Samarth Sadguru Narsimha Saraswati Maharaj, who resided in Audumbar, Wadi, and Ganagapur. This biography, written by Shri Saraswati Gangadhar, is famously known as the Brihat or Thorale Guru Charitra. Its immense popularity is emphasized by the statement that it is 'well known to young and old, studied daily in thousands of places, and used for Parayans,' establishing it as a cornerstone of devotional literature in Maharashtra.