The text mentions a scarcity of certain types of books. What are the two exemplary works that stand out, and who are their subjects?

The preface in Chapter 0 notes that in Maharashtra, there are very few ancient, detailed, and poetic works suitable for devotional readings like Parayans and Saptahs. It then highlights two specific works that are exceptions. The first is the 'Brihat or Thorale Guru Charitra,' a sweet and graceful biography written by Shri Saraswati Gangadhar about Shri Samarth Sadguru Narsimha Saraswati Maharaj. The second is the 'Shri Sai Satcharita,' described as a recent, sweet, and inspirational biography written by Annasaheb Dabholkar about the modern saint, Shri Sachidanand Samarth Sadguru Sai Baba Maharaj of Shirdi.