How can devotees serve their Guru and build a community through books?

According to Chapter 0, a Sadguru accepts service from devotees through books in two main ways. One way is when a devotee writes a detailed biography of their Guru. By studying and performing Parayans (devotional readings) of such a poetic Guru biography, the writer performs Guru service. When other devotees also study and perform these Parayans, it creates a community activity. The writer then gains the merit of serving God in humanity (Jan-Janardan), and the other devotees in the congregation also achieve the purpose of their lives through this shared spiritual practice, which is considered a form of service.