What are the ways a devotee can offer service to their Sadguru through literary works and study?

According to the preface, a Sadguru accepts two main forms of service from devotees through books. The first is by having their biographies written by devotees, and the second is by accepting the service of study and Parayans (devotional readings) from both the writer and the wider community of devotees. As highlighted in Chapter 0, when devotees study and perform Parayans of a detailed biography, the writer gains merit for serving God in humanity, and the devotees themselves progress in their spiritual lives. This creates a powerful cycle of devotion and service centered around the Guru's life story.