How can devotees engage in service to Sadguru Sai Baba and help others connect with his life's purpose?

According to the preface in Chapter 0, a Sadguru accepts two main forms of service from devotees through books. One way is by having their biographies written, which then allows the writer and the congregation of devotees to perform service through study and Parayans (devotional readings). By studying a detailed poetic biography, the devotee performs Guru service. When other devotees also engage in this study, the writer gains merit for serving God in humanity (Jan-Janardan), and the readers are helped in achieving the purpose of their own lives.