How can devotees serve Sai Baba and build a community through books and writing?

According to Chapter 0, a Sadguru accepts two primary forms of service from devotees through books. One way is by having his biographies written by his devotees. This act of writing is considered Guru service. Subsequently, when other devotees study and perform Parayans (devotional readings) of these biographies, the writer gains the merit of serving God in humanity, and the entire congregation of devotees can achieve the purpose of their lives. This shared practice of studying a detailed work like the Shri Sai Satcharita helps to build a strong community around the teachings.