How can devotees offer service to their Sadguru through literary works?

According to Chapter 0, a Sadguru accepts service from devotees through books in two primary ways. The first is when the Sadguru creates great works themselves. The second method involves the Sadguru having their biographies written by their devotees. In this case, the writer performs a direct Guru service through the act of writing. Additionally, service is accepted through the study and Parayans (devotional readings) of these biographies by the wider congregation of devotees, which benefits both the author and the readers.