The preface identifies two major Guru biographies in Maharashtra suitable for Saptahs. Can you name these works, their authors, and the saints they are about?

The preface presented in Chapter 0 states that within Maharashtra, there is a scarcity of ancient, detailed, and poetic works suitable for Parayans, but it highlights two prominent exceptions. The first is the sweet and graceful biography known as the 'Brihat or Thorale Guru Charitra,' which was written by Shri Saraswati Gangadhar about the life of Shri Samarth Sadguru Narsimha Saraswati Maharaj. The second is the more recent, inspirational work titled 'Shri Sai Satcharita,' authored by the late devotee Shri Govind Raghunath alias Annasaheb Dabholkar, detailing the life of the modern saint, Shri Sai Baba Maharaj of Shirdi.