I want to contribute to the Sai community. According to the texts, what are the two primary forms of service a Sadguru accepts from devotees through books?

Chapter 0 outlines two main types of service that a Sadguru receives from devotees through literary works. The first way is by having his biographies written by his devotees. The second, and equally important, form of service is when the Sadguru accepts the study and performance of Parayans (devotional readings) of these biographies from both the original writer and the broader congregation of devotees. This collective engagement with the Guru's life story, such as with the Shri Sai Satcharita, serves as a profound act of devotion and community building.