From a writer's perspective, what is the spiritual benefit of authoring a detailed biography of a Guru like Sai Baba?

As detailed in Chapter 0, the act of writing a comprehensive biography of a Guru is a form of profound Guru service. When a writer creates such a work and other devotees then study it and perform Parayans, the writer is credited with the merit of serving God in humanity, referred to as Jan-Janardan, and performing public service. This allows the writer to help other devotees achieve the purpose of their lives. Essentially, by documenting the Guru's life and teachings in detail, the writer facilitates a wider community's spiritual growth and service.