How does the Sadguru accept service from devotees through literature, and how does this foster a spiritual community?

According to the text in Chapter 0, the Sadguru accepts two primary types of service from devotees through books. The first is when the Guru creates great works themselves, like the *Shri Dnyaneshwari*. The second, more relevant to community building, is when the Guru has his biographies written by devotees. The Sadguru then accepts service in the form of study and Parayans from both the writer and the entire congregation of devotees. This shared act of studying a comprehensive biography, such as the *Shri Sai Satcharita*, brings devotees together, allowing them to collectively serve the Guru and achieve the purpose of their lives.