How have devotees historically offered service to their Gurus through literary works?

The tradition shows that a Sadguru accepts service from devotees in two primary ways involving books. The Guru might create monumental works themselves, or they may accept service from devotees who write their biographies. As detailed in chapter 0, many devoted followers have written prose and poetic biographies of their Gurus in various languages, thereby offering a profound service. This service extends to the congregation of devotees who study these works through practices like Parayans, which is another form of devotional offering.