The preface mentions two exemplary Guru biographies from Maharashtra suitable for devotional reading. What are they and who wrote them?

The text identifies two specific, detailed, and poetic Guru biographies that are considered ideal for Parayans and Saptahs. As described in Chapter 0, the first is the famous and ancient Shri Guru Charitra. This biography of Shri Samarth Sadguru Narsimha Saraswati Maharaj was written by Shri Saraswati Gangadhar. The second is the more recent work, Shri Sai Satcharita, which is an inspirational biography of Shri Sachidanand Samarth Sadguru Sai Baba Maharaj written by the devotee Shri Govind Raghunath, also known as Annasaheb Dabholkar.