How does a Sadguru accept service from devotees through books?

The preface describes two primary ways a Sadguru takes service from devotees through literary works. The first way is when the Sadguru creates profound spiritual works themselves, with examples given such as Shri Dnyaneshwari or Shri Dasbodh. The second method, as explained in Chapter 0, is when the Sadguru inspires devotees to write their biographies. In this case, the Sadguru accepts service not only from the writer but also from the entire congregation of devotees who engage with the text through study and devotional readings known as Parayans. This creates a dual benefit for the writer and the readers.