How can devotees serve their Sadguru through books and written works?

According to the teachings in Chapter 0, a Sadguru accepts two primary forms of service from devotees through books. The first is when the Guru authors significant works themselves. The second, and more common method, is when the Guru has their biographies written by their devotees. The text explains that the Sadguru then accepts service from both the writer and the wider congregation of devotees who engage in the study and performance of Parayans (devotional readings) of these biographies. This act of creating and engaging with such literature is considered a profound form of service.