The preface discusses several Guru biographies. Why is the work by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj considered to be in a different category from those by Shri Saraswati Gangadhar and Shri Annasaheb Dabholkar?

According to the preface in Chapter 0, the Guru biography written by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj is not categorized with the others for a very specific reason. While the biographies by Shri Saraswati Gangadhar and the late Shri Annasaheb Dabholkar were written by devotees about their Guru, the work by Vasudevanand Saraswati Maharaj was written by the Maharaj himself. The text makes this clear by stating, 'Since this biography was written by the Maharaj himself, it cannot be categorized with the Guru biographies written by Shri Saraswati Gangadhar and the late Shri Annasaheb Dabholkar.' Therefore, its status as a work authored by the spiritual master, rather than a follower, sets it apart.