What are the spiritual merits and service-related benefits for both the author and the readers of a detailed Guru biography?

The source text from Chapter 0 outlines several benefits associated with engaging with detailed poetic Guru biographies. For the writer, the act of composing the biography is considered a form of direct Guru service. Concurrently, when other devotees study and perform Parayans of the work, the writer is said to gain the additional merit of serving God in humanity (Jan-Janardan) and performing public service. For the devotees who read and study the biography, it is a means by which they can achieve the purpose of their lives, as they are effectively receiving the Sadguru's service through the medium of the book.