How does the act of writing and studying a Guru's biography function as a form of service?

According to the preface in Chapter 0, writing a detailed poetic biography of a Guru is a direct form of Guru service for the author. This service extends to the wider community, as the Sadguru accepts service from both the writer and the congregation of devotees who study and perform Parayans of the work. When other devotees engage with the text, the writer gains the merit of serving God in humanity (Jan-Janardan) and public service. This is identified as one of the two primary ways a Sadguru takes service from devotees through books.