The preface mentions the Shri Sai Satcharita as a key text for Parayans. Does it name any other similar major Guru biographies from Maharashtra?

Yes, the preface does mention another significant work besides the Shri Sai Satcharita. As detailed in Chapter 0, before introducing the biography of Sai Baba, the text highlights a much older work: the 'sweet, succulent, and graceful biography written by Shri Saraswati Gangadhar about Shri Samarth Sadguru Narsimha Saraswati Maharaj'. This biography is famously known as the Brihat or Thorale Guru Charitra. The author of the preface emphasizes the rarity of such detailed works suitable for Parayans, stating that apart from the Guru Charitra and the Shri Sai Satcharita, 'no third work written in such detail is found' in Maharashtra, a point made clear in Chapter 0.