What other Guru biographies are mentioned besides Shri Sai Satcharita, and how do they compare in terms of publication and fame?

Besides the Shri Sai Satcharita, the preface mentions several other Guru biographies. Chapter 0 discusses a detailed and scholarly biography written by Shri Samarth Sadguru Tembhe Swami (Vasudevanand Saraswati Maharaj), but notes it had not become as famous as the work by Shri Saraswati Gangadhar. It also mentions hearing of a Guru biography by Shri Samarth Sadguru Dattatreya Maharaj of Balekundri, which did not seem to have been printed or published at the time. These are contrasted with the widely studied and published 'Brihat Guru Charitra' and 'Shri Sai Satcharita,' which were famous and used for daily study and Parayans.