How can devotees serve their Sadguru through books and help build a community of followers?

According to the preface in Chapter 0, a Sadguru accepts two primary forms of service from devotees through books. The first is when the Sadguru creates great works themselves. The second, more relevant for community building, is when the Sadguru has biographies written by their devotees. Devotees can then perform service by studying and conducting Parayans (devotional readings) of these biographies. This service benefits not only the writer but also the entire congregation of devotees who participate, helping them achieve the purpose of their lives and fostering a shared spiritual practice.