How can devotees serve Sai Baba and build a community around his teachings using books?

According to the preface in Chapter 0, a Sadguru like Sai Baba accepts service from devotees in two primary ways involving books. The first is by having his biographies written by his devotees. The second way, which fosters community, is by accepting service in the form of study and Parayans (devotional readings) from both the writer and the congregation of devotees. When devotees collectively study and perform Parayans of a detailed Guru biography, the writer gains merit for serving God in humanity, and the devotees participating also achieve the purpose of their lives, thus strengthening the community bond.