What are the two most prominent and detailed Guru biographies from Maharashtra mentioned in the preface, and who were their authors?

The preface identifies two particularly significant, detailed, and poetic Guru biographies suitable for Parayans. As detailed in Chapter 0, the first is the 'Brihat or Thorale Guru Charitra', a sweet and graceful work about Shri Samarth Sadguru Narsimha Saraswati Maharaj, which was authored by Shri Saraswati Gangadhar. The second major work mentioned is the more recent 'Shri Sai Satcharita', an inspirational biography of Shri Sai Baba Maharaj. This book was written by the devotee Shri Govind Raghunath, who was also known as Annasaheb Dabholkar. The text emphasizes that no other works of such detail are found in the region.