Why is the Guru biography by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj considered to be in a different category from those by Saraswati Gangadhar and Annasaheb Dabholkar?

The preface, as documented in Chapter 0, provides a specific reason for classifying the biography by Shri Samarth Sadguru Vasudevanand Saraswati Maharaj separately. Although it is described as a detailed and scholarly work, the text states it "cannot be categorized with the Guru biographies written by Shri Saraswati Gangadhar and the late Shri Annasaheb Dabholkar." The explicit reason given in Chapter 0 is that this particular biography was written by "the Maharaj himself," meaning the Guru was the author. This autobiographical nature sets it apart from the other works, which were written by devotees about their Guru.